[Bitrix\Main\ArgumentTypeException] 
The value of an argument 'signedValue' must be of type string (100)
/home/bitrix/www/bitrix/modules/main/lib/security/sign/signer.php:156
#0: Bitrix\Main\Security\Sign\Signer->unsign(NULL, string)
	/home/bitrix/www/local/components/brain/delivery.cart.calc/ajax.php:28