First things first, it’s possible maintenance mode was turned on during updates and is still set to the “On” position. This is an easy fix.
- Log into your WHMCS account
- Click the Setup tab
- Open General Settings (you may be asked to confirm your password, no sweat)
- Uncheck Maintenance Mode under the General tab
Now, you should notice the maintenance mode error has lifted. If not, stay tuned for the other troubleshooting steps we can take next.