[Error] 
Call to a member function isAdmin() on null (0)
/home/bitrix/ext_www/sleepshop.ua/bitrix/php_interface/init.php:57
#0: include_once
	/home/bitrix/ext_www/sleepshop.ua/bitrix/modules/main/include.php:234
#1: require_once(string)
	/home/bitrix/ext_www/sleepshop.ua/bitrix/modules/main/include/prolog_before.php:14
#2: require_once(string)
	/home/bitrix/ext_www/sleepshop.ua/bitrix/modules/main/include/prolog.php:10
#3: require_once(string)
	/home/bitrix/ext_www/sleepshop.ua/bitrix/header.php:1
#4: require(string)
	/home/bitrix/ext_www/sleepshop.ua/ua/catalog/index.php:1
#5: include_once(string)
	/home/bitrix/ext_www/sleepshop.ua/bitrix/modules/main/include/urlrewrite.php:159
#6: include_once(string)
	/home/bitrix/ext_www/sleepshop.ua/bitrix/urlrewrite.php:2