Fatal error: Uncaught Error: Interface "Doctrine\Common\Collections\Collection" not found in /home/digitalproduct/public_html/projectmanagementsoftware/vendor/doctrine/collections/lib/Doctrine/Common/Collections/ArrayCollection.php:41 Stack trace: #0 {main} thrown in /home/digitalproduct/public_html/projectmanagementsoftware/vendor/doctrine/collections/lib/Doctrine/Common/Collections/ArrayCollection.php on line 41