[Bitrix\Main\SystemException] 
Invalid entity name ``. (0)
/home/clients/legionerus_ftp2/domains/ledinflat.com/html/bitrix/modules/highloadblock/lib/highloadblock.php:319
#0: Bitrix\Highloadblock\HighloadBlockTable::compileEntity(boolean)
	/home/clients/legionerus_ftp2/domains/ledinflat.com/html/lestnitsa-pod-zakaz/lestnitsa-pod-zakaz.php:17
#1: GetEntityDataClass(integer)
	/home/clients/legionerus_ftp2/domains/ledinflat.com/html/lestnitsa-pod-zakaz/lestnitsa-pod-zakaz.php:153