WHMCS Tags troubleshooting-article Troubleshoot and resolve IPartner authentication failure errors while using WebNIC for domain registrations. Troubleshoot and resolve errors when a client cannot retrieve their WebPros Cloud service login credentials. Troubleshoot and resolve provisioning errors when the WebPros Partner addon module cannot create a license or service in Manage2. Troubleshoot and resolve Whoops Exception Maximum execution time of 30 seconds exceeded errors. Troubleshoot and resolve Attribute value of type NMTOKEN must be a name token errors while using a WorldPay payment gateway module. Troubleshoot and resolve Failed to load module “WpToolkitCli” errors. Troubleshoot and resolve issues with the www subdomain on Plesk. Troubleshoot and resolve The installer refused the administrator password errors. Troubleshoot and resolve license validation, suspended license, and stuck validation errors for the E-Invoicing addon module. Troubleshoot and resolve Deep-link handling failed errors that occur while using the Nova Cloud: Prompt First addon module. Troubleshoot and resolve the error that appears when the E-Invoicing addon module cannot synchronize your account with the e-invoicing service after you save settings. Troubleshoot and resolve missing client data warnings, contact export failures, and clients without E-Invoicing enabled in the E-Invoicing addon module. Troubleshoot and resolve invoices that fail to export or show an Error status in the E-Invoicing addon module, including eligibility checks and retry limits. Troubleshoot and resolve changes to an invoice that you already exported to the e-invoicing service, which the system treats as immutable. Troubleshoot and resolve invoices with an e-invoicing status that does not update after export, including webhook delivery and 401 errors. Troubleshoot and resolve invoices that show a Refused status in the E-Invoicing addon module after the recipient rejects the e-invoice.