Troubleshooting a 404 error after updating
After updating to version 7.4 you may encounter a 404 "Page Not Found" type error message when accessing certain pages in the WHMCS admin area.
To resolve this error, follow these steps:
1. Navigate to Setup > General Settings
2. Scroll down to the Friendly URLs setting
3. Click the Reset arrows icon
3. You should now see a success message similar to this:
The problem should now be resolved.