When you update WHMCS, the system will attempt to delete unused legacy modules. This helps to prevent problems due to older PHP code.
Troubleshoot and resolve Failed to remove legacy modules errors.
If you use custom themes or templates, you will need to update them for any changes in new WHMCS versions.
Troubleshoot and resolve Check for Updates Failed errors.
Troubleshoot and resolve new versions not appearing after checking for updates.
Troubleshoot and resolve No Existing Installation Was Detected errors.
We sometimes release security updates to address important issues and vulnerabilities that could affect your WHMCS installation. We recommend downloading security updates as soon as possible.