Venicius Holanda
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guys has anyone had this error? he's about to drive me crazy! Oops! Something went wrong and we couldn't process your request. Please go back to the previous page and try again. For additional assistance, please reference the WHMCS TroubleShooting Guide » TypeError: Argument 1 passed to WHMCS\User\Validation\ValidationCom\ValidationCom::getSubmitUrlForUser() must be an instance of WHMCS\User\User, null given, called in /var/www/html/cart.php on line 0 and defined in /var/www/html/vendor/whmcs/whmcs-foundation/lib/User/Validation/ValidationCom/ValidationCom.php:0 Stack trace: #0 /var/www/html/cart.php(0): WHMCS\User\Validation\ValidationCom\ValidationCom->getSubmitUrlForUser(NULL) #1 {main}