Make sure to check for any problems both during and immediately after the upgrade process.
You can check for updates and apply them directly in the Admin Area.
To prevent problems, we recommend testing updates and customizations in a test environment before applying them to your production server.
Troubleshoot and resolve Application configuration file is not writable errors.
If you use custom templates, you will need to update them for any changes in new WHMCS versions.
Troubleshoot and resolve issues that cause the system to disable automatic updates.
Troubleshoot and resolve a blank Admin Dashboard after an update.