Invalid or Corrupt Certificate ErrorsTroubleshoot and resolve Certification Error - Invalid or Corrupt Certificate errors.
Invalid Reset Link ErrorsTroubleshoot and resolve The reset link you have followed is invalid errors.
Invalid SASL Argument ErrorsTroubleshoot and resolve last request failed: invalid SASL argument errors.
Invalid Site Key ErrorsTroubleshoot and resolve Google reCAPTCHA or hCaptcha® Invalid Site Key errors.
Invalid VAT Number ErrorsTroubleshoot and resolve issues with The supplied VAT number is not valid errors while collecting Value-Added Tax (VAT) for the United Kingdom.
InvalidArgumentException Carbon ErrorsTroubleshoot and resolve InvalidArgumentException: Data missing errors.
ionCube Fatal Decoding ErrorsTroubleshoot and resolve Fatal error: The file was encoded by... errors.
ionCube Loader Site ErrorsTroubleshoot and resolve Site error: the ionCube PHP Loader needs to be installed. errors.
Key Generation Failed ErrorsTroubleshooting and resolving Key Generation Failed: (XID xxxxxx) You do not have the feature “sslmanager” errors while selling SSL certificates through WHMCS MarketConnect.
Large Database Backup FailuresTroubleshoot and resolve failing database backups for large WHMCS installations.
License Key Required ErrorsTroubleshoot and resolve A license key is required. errors during installation.
Licensing Invalid Key ErrorsTroubleshoot and resolve Invalid Key errors while using the Software Licensing addon.
Licensing Local Key GenerationTroubleshoot and resolve the Software Licensing addon generating a new key with each request.