[Error] 
Class 'Bitrix\Main\Text\StringHelper' not found (0)
/home/bitrix/www/bitrix/modules/main/lib/orm/objectify/entityobject.php:1190
#0: Bitrix\Main\ORM\Objectify\EntityObject->sysSetActual(string, integer)
	/home/bitrix/www/bitrix/modules/main/lib/orm/query/result.php:191
#1: Bitrix\Main\ORM\Query\Result->fetchObject()
	/home/bitrix/www/bitrix/modules/main/include.php:64
#2: require_once(string)
	/home/bitrix/www/bitrix/modules/main/include/prolog_before.php:15
#3: require_once(string)
	/home/bitrix/www/bitrix/modules/main/include/prolog.php:21
#4: require_once(string)
	/home/bitrix/www/bitrix/header.php:1
#5: require(string)
	/home/bitrix/www/by/events/index.php:2