WHMCS uses a MySQL® database to store all of your business data, including client and financial records.
Troubleshoot and resolve (S)FTP Backup - Uploading Failed errors.
Troubleshoot and resolve (S)FTP: Unable to open for writing errors.
Troubleshoot and resolve (S)FTP: Unable to write to temp file errors.
Troubleshoot and resolve Argument 1 passed must be an instance of PDOStatement errors.
Troubleshoot and resolve Base table or view not found errors.
Troubleshoot and resolve Column 'group_id' cannot be null errors.