WHMCS Troubleshooting Troubleshoot Payments Troubleshoot and resolve Error Code PE101, Account is not approved to sell., or Account has been closed. errors while using the 2CheckOut payment gateway module. Troubleshoot and resolve Remote Transaction Failure. Please Contact Support. errors. Stripe customers in some locations may receive Reserve Bank of India (RBI) instructions from Stripe. Troubleshoot and resolve issues that occur when you have not established PCI compliance with Stripe. Troubleshoot and resolve An Error Occurred. Please try again. errors. Troubleshoot and resolve issues with customers receiving unexpected subscription cancellation emails from PayPal®. Troubleshoot and resolve unexplained declined cards and failures.