Fatal error: Uncaught Error: Call to undefined function Bitrix\Main\Composite\mb_strlen() in /workspace/sites/santehnika-i-plitka.ru/bitrix/modules/main/lib/composite/helper.php:178
Stack trace:
#0 /workspace/sites/santehnika-i-plitka.ru/bitrix/modules/main/lib/composite/responder.php(60): Bitrix\Main\Composite\Helper::isBitrixFolder()
#1 /workspace/sites/santehnika-i-plitka.ru/bitrix/modules/main/lib/composite/responder.php(28): Bitrix\Main\Composite\Responder::isValidRequest()
#2 /workspace/sites/santehnika-i-plitka.ru/bitrix/modules/main/include/prolog.php(7): Bitrix\Main\Composite\Responder::respond()
#3 /workspace/sites/santehnika-i-plitka.ru/bitrix/header.php(1): require_once('/workspace/site...')
#4 /workspace/sites/santehnika-i-plitka.ru/catalog/3d-konstruktor.php(2): require('/workspace/site...')
#5 {main}
thrown in /workspace/sites/santehnika-i-plitka.ru/bitrix/modules/main/lib/composite/helper.php on line 178