Fatal error: Uncaught Error: Class "ParagonIE\Halite\Alerts\HaliteAlert" not found in C:\Apache24\htdocs\cms_upgrade\vendor\paragonie\halite\src\Alerts\CannotSerializeKey.php:14 Stack trace: #0 {main} thrown in C:\Apache24\htdocs\cms_upgrade\vendor\paragonie\halite\src\Alerts\CannotSerializeKey.php on line 14