InvalidArgumentException Carbon Errors
Problem
After upgrading your server environment to PHP 7.4, you see the following error at Configuration () > System Health:
InvalidArgumentException: Data missing in /path/to/whmcs/cs/vendor/nesbot/carbon/src/Carbon/Carbon.php:425
Cause
Your system’s PHP version is not compatible with your current WHMCS version.
Solution
Move to a compatible PHP version for your current WHMCS release.
- For more information, see System Requirements and PHP Upgrades.
- For assistance, contact your hosting provider or system administrator.
Last modified: 2025 July 28