diff --git a/langs/en.json b/langs/en.json
index c62d2af73..a71c9b692 100644
--- a/langs/en.json
+++ b/langs/en.json
@@ -1,7 +1,10 @@
 {
     "noReportPeers": "Warning: no report peers are set, please add the following method to your event handler",
     "manualAdminActionRequired": "!!!!!!!!! MANUAL SYSTEM ADMIN ACTION REQUIRED !!!!!!!!!",
-    "mmapError": "The maximum number of mmap'ed regions was reached (%s): please increase the vm.max_map_count kernel config to 262144 to fix.\nTo fix, run the following command as root: echo 262144 | sudo tee /proc/sys/vm/max_map_count\nTo persist the change across reboots: echo vm.max_map_count=262144 | sudo tee /etc/sysctl.d/40-madelineproto.conf\nOn Windows and WSL, increasing the size of the pagefile might help; please switch to native Linux if the issue persists.",
+    "mmapErrorPart1": "The maximum number of mmap'ed regions was reached (%s): please increase the vm.max_map_count kernel config to 262144 to fix.",
+    "mmapErrorPart2": "To fix, run the following command as root: %s",
+    "mmapErrorPart3": "To persist the change across reboots: %s",
+    "mmapErrorPart4": "On Windows and WSL, increasing the size of the pagefile might help; please switch to native Linux if the issue persists.",
     "extensionRequired": "MadelineProto requires the %s extension to run. %s",
     "extensionRequiredInstallWithApt": "Try running sudo apt-get install %s.",
     "extensionRequiredInstallWithCustomInstructions": "Follow the instructions at %s to install it.",
diff --git a/src/EventHandler.php b/src/EventHandler.php
index 158b20f05..ba1ecfa59 100644
--- a/src/EventHandler.php
+++ b/src/EventHandler.php
@@ -155,6 +155,7 @@ abstract class EventHandler extends AbstractAPI
                 $this->setReportPeers(Tools::call($this->getReportPeers())->await());
             }
 
+            $old = true;
             $constructors = $this->getTL()->getConstructors();
             $methods = [];
             $handlers = [];
@@ -191,6 +192,7 @@ abstract class EventHandler extends AbstractAPI
                         $periodic->period
                     );
                     $this->periodicLoops[$method]->start();
+                    $old = false;
                     continue;
                 }
                 $filter = $methodRefl->getAttributes(
@@ -215,6 +217,10 @@ abstract class EventHandler extends AbstractAPI
                         EventLoop::queue($closure, $update);
                     }
                 };
+                $old = false;
+            }
+            if (!$old) {
+                self::validateEventHandler(static::class);
             }
             if ($has_any) {
                 $onAny = $this->onAny(...);
diff --git a/src/Exception.php b/src/Exception.php
index d99fab7b8..b0b7d6f03 100644
--- a/src/Exception.php
+++ b/src/Exception.php
@@ -117,9 +117,10 @@ class Exception extends \Exception
             Logger::log(Lang::$current_lang['manualAdminActionRequired'], Logger::FATAL_ERROR);
             Logger::log(Lang::$current_lang['manualAdminActionRequired'], Logger::FATAL_ERROR);
             Logger::log(Lang::$current_lang['manualAdminActionRequired']);
-            foreach (\explode("\n", \trim(Lang::$current_lang['mmapError'])) as $line) {
-                Logger::log(\sprintf($line, $maps), Logger::FATAL_ERROR);
-            }
+            Logger::log(sprintf(Lang::$current_lang['mmapError1'], $maps), Logger::FATAL_ERROR);
+            Logger::log(sprintf(Lang::$current_lang['mmapError2'], 'echo 262144 | sudo tee /proc/sys/vm/max_map_count'), Logger::FATAL_ERROR);
+            Logger::log(sprintf(Lang::$current_lang['mmapError3'], 'echo vm.max_map_count=262144 | sudo tee /etc/sysctl.d/40-madelineproto.conf'), Logger::FATAL_ERROR);
+            Logger::log(Lang::$current_lang['mmapError4'], Logger::FATAL_ERROR);
             Logger::log(Lang::$current_lang['manualAdminActionRequired']);
             Logger::log(Lang::$current_lang['manualAdminActionRequired'], Logger::FATAL_ERROR);
             Logger::log(Lang::$current_lang['manualAdminActionRequired'], Logger::FATAL_ERROR);
diff --git a/src/Lang.php b/src/Lang.php
index 245a35e41..d3011ef46 100644
--- a/src/Lang.php
+++ b/src/Lang.php
@@ -68,6 +68,10 @@ final class Lang
             'deserialization_error' => 'هەڵەیەک لە کاتی ڕیزبەندیکردندا ڕوویدا',
             'done' => 'تەواو!',
             'encode_double_error' => 'نەتوانرا بە باشی دووانە کۆد بکات',
+            'extensionRecommended' => 'Warning: the %s extension is not installed, please install it to speed up MadelineProto!',
+            'extensionRequired' => 'MadelineProto requires the %s extension to run. %s',
+            'extensionRequiredInstallWithApt' => 'Try running sudo apt-get install %s.',
+            'extensionRequiredInstallWithCustomInstructions' => 'Follow the instructions at %s to install it.',
             'file_not_exist' => 'فایله‌که‌ بوونی نییه‌',
             'file_parsing' => 'پارسکردنی %s...',
             'file_type_invalid' => 'جۆری پەڕگەی نادروست دۆزراوەتەوە (%s)',
@@ -111,8 +115,14 @@ final class Lang
             'long_not_32' => 'بەهای پێدراو درێژییەکەی ٣٢ بایت نییە',
             'long_not_64' => 'بەهای پێدراو درێژییەکەی ٦٤ بایت نییە',
             'madelineproto_ready' => 'MadelineProto ئامادەیە!',
+            'manualAdminActionRequired' => '!!!!!!!!! MANUAL SYSTEM ADMIN ACTION REQUIRED !!!!!!!!!',
             'method_not_found' => 'نەتوانرا شێواز بدۆزرێتەوە: ',
+            'mmapError' => 'The maximum number of mmap\'ed regions was reached (%s): please increase the vm.max_map_count kernel config to 262144 to fix.
+To fix, run the following command as root: echo 262144 | sudo tee /proc/sys/vm/max_map_count
+To persist the change across reboots: echo vm.max_map_count=262144 | sudo tee /etc/sysctl.d/40-madelineproto.conf
+On Windows and WSL, increasing the size of the pagefile might help; please switch to native Linux if the issue persists.',
             'nearest_dc' => 'ئێمە لە %s داین، نزیکترین DC %d ە.',
+            'noReportPeers' => 'Warning: no report peers are set, please add the following method to your event handler',
             'non_text_conversion' => 'هێشتا ناتوانرێت نامە نا کورتەکان بگۆڕدرێت!',
             'not_loggedIn' => 'من چوومەتە ژوورەوە!',
             'not_numeric' => 'بەهای پێدراو ژمارەیی نییە',
@@ -190,6 +200,10 @@ final class Lang
             'deserialization_error' => 'An error occurred on deserialization',
             'done' => 'Done!',
             'encode_double_error' => 'Could not properly encode double',
+            'extensionRecommended' => 'Warning: the %s extension is not installed, please install it to speed up MadelineProto!',
+            'extensionRequired' => 'MadelineProto requires the %s extension to run. %s',
+            'extensionRequiredInstallWithApt' => 'Try running sudo apt-get install %s.',
+            'extensionRequiredInstallWithCustomInstructions' => 'Follow the instructions at %s to install it.',
             'file_not_exist' => 'File does not exist',
             'file_parsing' => 'Parsing %s...',
             'file_type_invalid' => 'Invalid file type detected (%s)',
@@ -233,8 +247,14 @@ final class Lang
             'long_not_32' => 'Given value is not 32 bytes long',
             'long_not_64' => 'Given value is not 64 bytes long',
             'madelineproto_ready' => 'MadelineProto is ready!',
+            'manualAdminActionRequired' => '!!!!!!!!! MANUAL SYSTEM ADMIN ACTION REQUIRED !!!!!!!!!',
             'method_not_found' => 'Could not find method: ',
+            'mmapError' => 'The maximum number of mmap\'ed regions was reached (%s): please increase the vm.max_map_count kernel config to 262144 to fix.
+To fix, run the following command as root: echo 262144 | sudo tee /proc/sys/vm/max_map_count
+To persist the change across reboots: echo vm.max_map_count=262144 | sudo tee /etc/sysctl.d/40-madelineproto.conf
+On Windows and WSL, increasing the size of the pagefile might help; please switch to native Linux if the issue persists.',
             'nearest_dc' => 'We\'re in %s, nearest DC is %d.',
+            'noReportPeers' => 'Warning: no report peers are set, please add the following method to your event handler',
             'non_text_conversion' => 'Can\'t convert non text messages yet!',
             'not_loggedIn' => 'I\'m not logged in!',
             'not_numeric' => 'Given value isn\'t numeric',
@@ -312,6 +332,10 @@ final class Lang
             'deserialization_error' => 'مشکلی در سریال‌زدایی پیش آمد',
             'done' => 'انجام شد!',
             'encode_double_error' => 'نمی‌توان به درستی double را رمزنگاری (انکد) کرد',
+            'extensionRecommended' => 'Warning: the %s extension is not installed, please install it to speed up MadelineProto!',
+            'extensionRequired' => 'MadelineProto requires the %s extension to run. %s',
+            'extensionRequiredInstallWithApt' => 'Try running sudo apt-get install %s.',
+            'extensionRequiredInstallWithCustomInstructions' => 'Follow the instructions at %s to install it.',
             'file_not_exist' => 'فایل وجود ندارد',
             'file_parsing' => 'درحال تجزیه %s...',
             'file_type_invalid' => 'نوع فایل نامعتبر شناسایی شد (%s)',
@@ -355,8 +379,14 @@ final class Lang
             'long_not_32' => 'مقدار ورودی به طول 32 بایت نیست',
             'long_not_64' => 'مقدار ورودی به طول 64 بایت نیست',
             'madelineproto_ready' => 'MadelineProto آماده است!',
+            'manualAdminActionRequired' => '!!!!!!!!! MANUAL SYSTEM ADMIN ACTION REQUIRED !!!!!!!!!',
             'method_not_found' => 'تابع پیدا نشد: ',
+            'mmapError' => 'The maximum number of mmap\'ed regions was reached (%s): please increase the vm.max_map_count kernel config to 262144 to fix.
+To fix, run the following command as root: echo 262144 | sudo tee /proc/sys/vm/max_map_count
+To persist the change across reboots: echo vm.max_map_count=262144 | sudo tee /etc/sysctl.d/40-madelineproto.conf
+On Windows and WSL, increasing the size of the pagefile might help; please switch to native Linux if the issue persists.',
             'nearest_dc' => 'ما در %s هستیم، نزدیک ترین دیتاسنتر %d است.',
+            'noReportPeers' => 'Warning: no report peers are set, please add the following method to your event handler',
             'non_text_conversion' => 'فعلا نمی‌توان پیام‌های غیرمتنی را تبدیل کرد!',
             'not_loggedIn' => 'من وارد نشدم!',
             'not_numeric' => 'مقدار ورودی عددی نیست',
@@ -434,6 +464,10 @@ final class Lang
             'deserialization_error' => 'Une erreur s\'est produite lors de la désérialisation',
             'done' => 'Done!',
             'encode_double_error' => 'Could not properly encode double',
+            'extensionRecommended' => 'Warning: the %s extension is not installed, please install it to speed up MadelineProto!',
+            'extensionRequired' => 'MadelineProto requires the %s extension to run. %s',
+            'extensionRequiredInstallWithApt' => 'Try running sudo apt-get install %s.',
+            'extensionRequiredInstallWithCustomInstructions' => 'Follow the instructions at %s to install it.',
             'file_not_exist' => 'Le fichier n\'existe pas',
             'file_parsing' => 'Analyse de %s...',
             'file_type_invalid' => 'Invalid file type detected (%s)',
@@ -477,8 +511,14 @@ final class Lang
             'long_not_32' => 'La valeur donnée ne fait pas 32 octets',
             'long_not_64' => 'La valeur donnée ne fait pas 64 octets',
             'madelineproto_ready' => 'MadelineProto est prêt!',
+            'manualAdminActionRequired' => '!!!!!!!!! MANUAL SYSTEM ADMIN ACTION REQUIRED !!!!!!!!!',
             'method_not_found' => 'Could not find method: ',
+            'mmapError' => 'The maximum number of mmap\'ed regions was reached (%s): please increase the vm.max_map_count kernel config to 262144 to fix.
+To fix, run the following command as root: echo 262144 | sudo tee /proc/sys/vm/max_map_count
+To persist the change across reboots: echo vm.max_map_count=262144 | sudo tee /etc/sysctl.d/40-madelineproto.conf
+On Windows and WSL, increasing the size of the pagefile might help; please switch to native Linux if the issue persists.',
             'nearest_dc' => 'We\'re in %s, nearest DC is %d.',
+            'noReportPeers' => 'Warning: no report peers are set, please add the following method to your event handler',
             'non_text_conversion' => 'Impossible de convertir des messages non textuels pour le moment!',
             'not_loggedIn' => 'I\'m not logged in!',
             'not_numeric' => 'La valeur donnée n\'est pas numérique',
@@ -556,6 +596,10 @@ final class Lang
             'deserialization_error' => 'אירעה שגיאה בעת דה-סידריאליזציה',
             'done' => 'בוצע!',
             'encode_double_error' => 'לא ניתן היה לקודד כפול כראוי',
+            'extensionRecommended' => 'Warning: the %s extension is not installed, please install it to speed up MadelineProto!',
+            'extensionRequired' => 'MadelineProto requires the %s extension to run. %s',
+            'extensionRequiredInstallWithApt' => 'Try running sudo apt-get install %s.',
+            'extensionRequiredInstallWithCustomInstructions' => 'Follow the instructions at %s to install it.',
             'file_not_exist' => 'קובץ לא קיים',
             'file_parsing' => 'ממיר %s...',
             'file_type_invalid' => 'זוהה סוג קובץ לא חוקי (%s)',
@@ -599,8 +643,14 @@ final class Lang
             'long_not_32' => 'הערך הנתון אינו באורך 32 בתים',
             'long_not_64' => 'הערך הנתון אינו באורך 64 בתים',
             'madelineproto_ready' => 'MadelineProto מוכן!',
+            'manualAdminActionRequired' => '!!!!!!!!! MANUAL SYSTEM ADMIN ACTION REQUIRED !!!!!!!!!',
             'method_not_found' => 'הפונקציה לא נמצא: ',
+            'mmapError' => 'The maximum number of mmap\'ed regions was reached (%s): please increase the vm.max_map_count kernel config to 262144 to fix.
+To fix, run the following command as root: echo 262144 | sudo tee /proc/sys/vm/max_map_count
+To persist the change across reboots: echo vm.max_map_count=262144 | sudo tee /etc/sysctl.d/40-madelineproto.conf
+On Windows and WSL, increasing the size of the pagefile might help; please switch to native Linux if the issue persists.',
             'nearest_dc' => 'אנחנו ב %s, חוות שרתי ה DC הקרובה היא %d.',
+            'noReportPeers' => 'Warning: no report peers are set, please add the following method to your event handler',
             'non_text_conversion' => 'עדיין לא ניתן להמיר הודעות שאינן טקסט!',
             'not_loggedIn' => 'אני לא מחובר!',
             'not_numeric' => 'הערך הנתון אינו מספרי',
@@ -678,6 +728,10 @@ final class Lang
             'deserialization_error' => 'C\'è stato un errore durante la deserializzazione',
             'done' => 'Fatto!',
             'encode_double_error' => 'Non sono riuscito a codificare il numero a virgola mobile fornito',
+            'extensionRecommended' => 'Warning: the %s extension is not installed, please install it to speed up MadelineProto!',
+            'extensionRequired' => 'MadelineProto requires the %s extension to run. %s',
+            'extensionRequiredInstallWithApt' => 'Try running sudo apt-get install %s.',
+            'extensionRequiredInstallWithCustomInstructions' => 'Follow the instructions at %s to install it.',
             'file_not_exist' => 'Il file specificato non esiste',
             'file_parsing' => 'Leggendo %s...',
             'file_type_invalid' => 'È stato fornito un tipo file errato',
@@ -721,8 +775,14 @@ final class Lang
             'long_not_32' => 'Il valore fornito non è lungo 32 byte',
             'long_not_64' => 'Il valore fornito non è lungo 64 byte',
             'madelineproto_ready' => 'MadelineProto è pronto!',
+            'manualAdminActionRequired' => '!!!!!!!!! MANUAL SYSTEM ADMIN ACTION REQUIRED !!!!!!!!!',
             'method_not_found' => 'Impossibile trovare il seguente metodo: ',
+            'mmapError' => 'The maximum number of mmap\'ed regions was reached (%s): please increase the vm.max_map_count kernel config to 262144 to fix.
+To fix, run the following command as root: echo 262144 | sudo tee /proc/sys/vm/max_map_count
+To persist the change across reboots: echo vm.max_map_count=262144 | sudo tee /etc/sysctl.d/40-madelineproto.conf
+On Windows and WSL, increasing the size of the pagefile might help; please switch to native Linux if the issue persists.',
             'nearest_dc' => 'Siamo in %s, il DC più vicino è %d.',
+            'noReportPeers' => 'Warning: no report peers are set, please add the following method to your event handler',
             'non_text_conversion' => 'Non posso ancora convertire messaggi media!',
             'not_loggedIn' => 'Non ho ancora fatto il login!',
             'not_numeric' => 'Il valore fornito non è numerico',
@@ -800,6 +860,10 @@ final class Lang
             'deserialization_error' => 'An error occurred on deserialization',
             'done' => 'Готово!',
             'encode_double_error' => 'Could not properly encode double',
+            'extensionRecommended' => 'Warning: the %s extension is not installed, please install it to speed up MadelineProto!',
+            'extensionRequired' => 'MadelineProto requires the %s extension to run. %s',
+            'extensionRequiredInstallWithApt' => 'Try running sudo apt-get install %s.',
+            'extensionRequiredInstallWithCustomInstructions' => 'Follow the instructions at %s to install it.',
             'file_not_exist' => 'File does not exist',
             'file_parsing' => 'Parsing %s...',
             'file_type_invalid' => 'Invalid file type detected (%s)',
@@ -843,8 +907,14 @@ final class Lang
             'long_not_32' => 'Given value is not 32 bytes long',
             'long_not_64' => 'Given value is not 64 bytes long',
             'madelineproto_ready' => 'MadelineProto is ready!',
+            'manualAdminActionRequired' => '!!!!!!!!! MANUAL SYSTEM ADMIN ACTION REQUIRED !!!!!!!!!',
             'method_not_found' => 'Could not find method: ',
+            'mmapError' => 'The maximum number of mmap\'ed regions was reached (%s): please increase the vm.max_map_count kernel config to 262144 to fix.
+To fix, run the following command as root: echo 262144 | sudo tee /proc/sys/vm/max_map_count
+To persist the change across reboots: echo vm.max_map_count=262144 | sudo tee /etc/sysctl.d/40-madelineproto.conf
+On Windows and WSL, increasing the size of the pagefile might help; please switch to native Linux if the issue persists.',
             'nearest_dc' => 'Вы в %s, ближайший ДЦ: %d.',
+            'noReportPeers' => 'Warning: no report peers are set, please add the following method to your event handler',
             'non_text_conversion' => 'Can\'t convert non text messages yet!',
             'not_loggedIn' => 'I\'m not logged in!',
             'not_numeric' => 'Given value isn\'t numeric',
@@ -922,6 +992,10 @@ final class Lang
             'deserialization_error' => 'Seriyadan chiqarishda xatolik yuz berdi',
             'done' => 'Bajarildi!',
             'encode_double_error' => 'Doubleni toʻgʻri kodlab boʻlmadi',
+            'extensionRecommended' => 'Warning: the %s extension is not installed, please install it to speed up MadelineProto!',
+            'extensionRequired' => 'MadelineProto requires the %s extension to run. %s',
+            'extensionRequiredInstallWithApt' => 'Try running sudo apt-get install %s.',
+            'extensionRequiredInstallWithCustomInstructions' => 'Follow the instructions at %s to install it.',
             'file_not_exist' => 'Fayl mavjud emas',
             'file_parsing' => '%s tahlil qilinmoqda...',
             'file_type_invalid' => 'Yaroqsiz fayl turi aniqlandi (%s)',
@@ -965,8 +1039,14 @@ final class Lang
             'long_not_32' => 'Berilgan qiymat 32 bayt emas',
             'long_not_64' => 'Berilgan qiymat 64 bayt emas',
             'madelineproto_ready' => 'MadelineProto tayyor!',
+            'manualAdminActionRequired' => '!!!!!!!!! MANUAL SYSTEM ADMIN ACTION REQUIRED !!!!!!!!!',
             'method_not_found' => 'Metodni topib bo\'lmadi: ',
+            'mmapError' => 'The maximum number of mmap\'ed regions was reached (%s): please increase the vm.max_map_count kernel config to 262144 to fix.
+To fix, run the following command as root: echo 262144 | sudo tee /proc/sys/vm/max_map_count
+To persist the change across reboots: echo vm.max_map_count=262144 | sudo tee /etc/sysctl.d/40-madelineproto.conf
+On Windows and WSL, increasing the size of the pagefile might help; please switch to native Linux if the issue persists.',
             'nearest_dc' => 'Biz %s ichidamiz, eng yaqin shahar %d.',
+            'noReportPeers' => 'Warning: no report peers are set, please add the following method to your event handler',
             'non_text_conversion' => 'Matnli boʻlmagan xabarlarni oʻzgartirib boʻlmaydi!',
             'not_loggedIn' => 'Kirish amalga oshirilmagan!',
             'not_numeric' => 'Kiritilgan qiymat raqamlar emas',
@@ -1046,6 +1126,10 @@ final class Lang
         'deserialization_error' => 'An error occurred on deserialization',
         'done' => 'Done!',
         'encode_double_error' => 'Could not properly encode double',
+        'extensionRecommended' => 'Warning: the %s extension is not installed, please install it to speed up MadelineProto!',
+        'extensionRequired' => 'MadelineProto requires the %s extension to run. %s',
+        'extensionRequiredInstallWithApt' => 'Try running sudo apt-get install %s.',
+        'extensionRequiredInstallWithCustomInstructions' => 'Follow the instructions at %s to install it.',
         'file_not_exist' => 'File does not exist',
         'file_parsing' => 'Parsing %s...',
         'file_type_invalid' => 'Invalid file type detected (%s)',
@@ -1089,8 +1173,14 @@ final class Lang
         'long_not_32' => 'Given value is not 32 bytes long',
         'long_not_64' => 'Given value is not 64 bytes long',
         'madelineproto_ready' => 'MadelineProto is ready!',
+        'manualAdminActionRequired' => '!!!!!!!!! MANUAL SYSTEM ADMIN ACTION REQUIRED !!!!!!!!!',
         'method_not_found' => 'Could not find method: ',
+        'mmapError' => 'The maximum number of mmap\'ed regions was reached (%s): please increase the vm.max_map_count kernel config to 262144 to fix.
+To fix, run the following command as root: echo 262144 | sudo tee /proc/sys/vm/max_map_count
+To persist the change across reboots: echo vm.max_map_count=262144 | sudo tee /etc/sysctl.d/40-madelineproto.conf
+On Windows and WSL, increasing the size of the pagefile might help; please switch to native Linux if the issue persists.',
         'nearest_dc' => 'We\'re in %s, nearest DC is %d.',
+        'noReportPeers' => 'Warning: no report peers are set, please add the following method to your event handler',
         'non_text_conversion' => 'Can\'t convert non text messages yet!',
         'not_loggedIn' => 'I\'m not logged in!',
         'not_numeric' => 'Given value isn\'t numeric',