[Bitrix\Main\DB\SqlQueryException] 
Mysql query error: (2006) MySQL server has gone away (400)
INSERT IGNORE INTO b_module_to_module (SORT, FROM_MODULE_ID, MESSAGE_ID, TO_MODULE_ID, 	TO_CLASS, TO_METHOD, TO_PATH, TO_METHOD_ARG, VERSION, UNIQUE_ID) VALUES (100, 'main', 'OnEndBufferContent', 'dw.deluxe',    'DwBuffer', 'modifyBuffer', '', '', 2, '3c5bb69c13afb5a07d415bc1dae01993')
/home/bitrix/www/bitrix/modules/main/lib/db/mysqliconnection.php:146
#0: Bitrix\Main\DB\MysqliConnection->queryInternal(string, array, NULL)
	/home/bitrix/www/bitrix/modules/main/lib/db/connection.php:327
#1: Bitrix\Main\DB\Connection->query(string, NULL)
	/home/bitrix/www/bitrix/modules/main/lib/db/connection.php:376
#2: Bitrix\Main\DB\Connection->queryExecute(string)
	/home/bitrix/www/bitrix/modules/main/lib/eventmanager.php:196
#3: Bitrix\Main\EventManager->registerEventHandlerInternal(string, string, string, string, string, integer, string, string, integer)
	/home/bitrix/www/bitrix/modules/main/lib/eventmanager.php:165
#4: Bitrix\Main\EventManager->registerEventHandler(string, string, string, string, string)
	/home/bitrix/www/bitrix/modules/dw.deluxe/include.php:24
#5: include_once(string)
	/home/bitrix/www/bitrix/modules/main/lib/loader.php:184
#6: Bitrix\Main\Loader::includeModuleInternal(string)
	/home/bitrix/www/bitrix/modules/main/lib/loader.php:140
#7: Bitrix\Main\Loader::includeModule(string)
	/home/bitrix/www/bitrix/templates/dresscode/header.php:7
#8: include_once(string)
	/home/bitrix/www/bitrix/modules/main/include/prolog_after.php:107
#9: require(string)
	/home/bitrix/www/bitrix/modules/main/include/prolog.php:11
#10: require_once(string)
	/home/bitrix/www/bitrix/header.php:1
#11: require(string)
	/home/bitrix/www/catalog/index.php:2
#12: include_once(string)
	/home/bitrix/www/bitrix/modules/main/include/urlrewrite.php:184
#13: include_once(string)
	/home/bitrix/www/bitrix/urlrewrite.php:2
----------

Fatal error: Uncaught Bitrix\Main\DB\SqlQueryException: Mysql query error: (2006) MySQL server has gone away in /home/bitrix/www/bitrix/modules/main/lib/db/mysqliconnection.php:146 Stack trace: #0 /home/bitrix/www/bitrix/modules/main/lib/db/connection.php(327): Bitrix\Main\DB\MysqliConnection->queryInternal('\n\t\t\t\tSELECT FRO...', Array, NULL) #1 /home/bitrix/www/bitrix/modules/main/lib/eventmanager.php(248): Bitrix\Main\DB\Connection->query('\n\t\t\t\tSELECT FRO...') #2 /home/bitrix/www/bitrix/modules/main/lib/eventmanager.php(341): Bitrix\Main\EventManager->loadEventHandlers() #3 /home/bitrix/www/bitrix/modules/main/classes/general/module.php(330): Bitrix\Main\EventManager->findEventHandlers('main', 'OnBeforeEndBuff...') #4 /home/bitrix/www/bitrix/modules/main/classes/general/main.php(3151): GetModuleEvents('main', 'OnBeforeEndBuff...', true) #5 [internal function]: CAllMain->EndBufferContent('<pre>[Bitrix\\Ma...', 9) #6 /home/bitrix/www/bitrix/modules/main/classes/general/main.php(3408): ob_end_flush() #7 [internal in /home/bitrix/www/bitrix/modules/main/lib/db/mysqliconnection.php on line 146