WHMCS Tags troubleshooting-article Troubleshoot and resolve Allowed memory size of xxxxx bytes exhausted errors. Troubleshoot and resolve Application configuration file is not writable errors. You see a `Argument 7 passed to processPoppedTicket()` error in bounced support emails after performing a WHMCS software update. Troubleshoot and resolve Argument 1 passed must be an instance of PDOStatement errors. Troubleshoot and resolve failures when attempting to upload files to a support ticket. Troubleshoot and resolve Authentication failed errors while working with payment gateways. Troubleshoot and resolve The system prevented an autoresponder from opening a ticket. (WHMCS 8.4 and later) or Prevented an Auto Responder from Opening a Ticket (WHMCS 8.3 and earlier) errors.