[Error] 
Call to a member function GetUserGroupArray() on string (0)
/sites/ostorekg/bitrix/php_interface/init.php:313
#0: DoIBlockAfterSave(string, array)
	/sites/ostorekg/bitrix/modules/main/classes/general/module.php:475
#1: ExecuteModuleEventEx(array, array)
	/sites/ostorekg/bitrix/modules/catalog/lib/compatible/eventcompatibility.php:670
#2: Bitrix\Catalog\Compatible\EventCompatibility::handlerPriceOnAfterModify(object, string)
	/sites/ostorekg/bitrix/modules/catalog/lib/compatible/eventcompatibility.php:393
#3: Bitrix\Catalog\Compatible\EventCompatibility::handlerPriceOnAfterUpdate(object)
	
#4: call_user_func_array(array, array)
	/sites/ostorekg/bitrix/modules/main/lib/eventmanager.php:448
#5: Bitrix\Main\EventManager->sendToEventHandler(array, object)
	/sites/ostorekg/bitrix/modules/main/lib/eventmanager.php:384
#6: Bitrix\Main\EventManager->send(object)
	/sites/ostorekg/bitrix/modules/main/lib/event.php:142
#7: Bitrix\Main\Event->send()
	/sites/ostorekg/bitrix/modules/catalog/lib/model/entity.php:234
#8: Bitrix\Catalog\Model\Entity::update(string, array)
	/sites/ostorekg/bitrix/php_interface/include/catalog_import/nur_run.php:113
#9: import_1c->updateCost()
	/sites/ostorekg/bitrix/php_interface/include/catalog_import/nur_run.php:33
#10: import_1c->sync()
	/sites/ostorekg/bitrix/php_interface/include/catalog_import/nur_run.php:136
#11: include(string)
	/sites/ostorekg/bitrix/modules/catalog/general/catalog_import.php:322
#12: CAllCatalogImport::PreGenerateImport(integer)
	/sites/ostorekg/bitrix/modules/main/classes/mysql/agent.php(163) : eval()'d code:1
#13: eval
	/sites/ostorekg/bitrix/modules/main/classes/mysql/agent.php:163
#14: CAgent::ExecuteAgents(string)
	/sites/ostorekg/bitrix/modules/main/classes/mysql/agent.php:40
#15: CAgent::CheckAgents()
	/sites/ostorekg/bitrix/modules/main/include.php:264
#16: require_once(string)
	/sites/ostorekg/bitrix/modules/main/include/prolog_before.php:14
#17: require_once(string)
	/sites/ostorekg/bitrix/modules/main/include/prolog.php:10
#18: require_once(string)
	/sites/ostorekg/bitrix/header.php:1
#19: require(string)
	/sites/ostorekg/kg/catalog/index.php:2
#20: include_once(string)
	/sites/ostorekg/bitrix/modules/main/include/urlrewrite.php:159
#21: include_once(string)
	/sites/ostorekg/bitrix/urlrewrite.php:2