Fatal error: Uncaught Error: Class "Illuminate\Support\Collection" not found in /home/crmcodingobjects/public_html/modules/Core/App/Common/Mail/Headers/HeadersCollection.php:17 Stack trace: #0 {main} thrown in /home/crmcodingobjects/public_html/modules/Core/App/Common/Mail/Headers/HeadersCollection.php on line 17