Troubleshoot and resolve Column 'group_id' cannot be null errors.
Troubleshoot and resolve MySQL Error Code 1142 - Command denied to user errors.
Troubleshoot and resolve Could not connect to database errors.
Troubleshoot and resolve issues with the cron job becoming stuck while executing the system queue.
We strongly recommend backing up your WHMCS installation's database regularly. If a catastrophic system failure occurs, restoring a recent database backup can ensure the safety and security of your data.
You can monitor and manage your WHMCS installation's database, including optimizing database tables and manually downloading database backups, from within the WHMCS Admin Area.
Troubleshoot and resolve InvalidArgumentException: Query string must not include a URI fragment errors.