[Bitrix\Main\DB\SqlQueryException] 
Mysql query error: (2006) MySQL server has gone away (400)
SELECT RELEASE_LOCK('c78ef2a466acea0256f254cd4283b236c5c4f37636a95516fac4245fadeb791f') as L
/home/bitrix/ext_www/bfla.eu/bitrix/modules/main/lib/db/mysqliconnection.php:146
#0: Bitrix\Main\DB\MysqliConnection->queryInternal(string, array, NULL)
	/home/bitrix/ext_www/bfla.eu/bitrix/modules/main/lib/db/connection.php:327
#1: Bitrix\Main\DB\Connection->query(string)
	/home/bitrix/ext_www/bfla.eu/bitrix/modules/main/lib/db/mysqlcommonconnection.php:263
#2: Bitrix\Main\DB\MysqlCommonConnection->unlock(string)
	/home/bitrix/ext_www/bfla.eu/bitrix/modules/main/lib/composite/internals/locker.php:42
#3: Bitrix\Main\Composite\Internals\Locker::unlock(string)
	/home/bitrix/ext_www/bfla.eu/bitrix/modules/main/lib/composite/engine.php:499
#4: Bitrix\Main\Composite\Engine::processPageContent(string)
	/home/bitrix/ext_www/bfla.eu/bitrix/modules/main/lib/composite/engine.php:425
#5: Bitrix\Main\Composite\Engine::endBuffering(string, string)
	/home/bitrix/ext_www/bfla.eu/bitrix/modules/main/classes/general/main.php:3239
#6: CAllMain->EndBufferContent(string)
	/home/bitrix/ext_www/bfla.eu/bitrix/modules/main/classes/general/main.php:3182
#7: CAllMain->EndBufferContentMan()
	/home/bitrix/ext_www/bfla.eu/bitrix/modules/main/include/epilog_after.php:43
#8: require(string)
	/home/bitrix/ext_www/bfla.eu/bitrix/modules/main/include/epilog.php:3
#9: require_once(string)
	/home/bitrix/ext_www/bfla.eu/bitrix/footer.php:4
#10: require(string)
	/home/bitrix/ext_www/bfla.eu/index.php:74