Fatal error: Uncaught Error: Class "OC\Share20\DefaultShareProvider" not found in /home/tzuovhm/tzuovhm/apps/sharebymail/lib/ShareByMailProvider.php:44 Stack trace: #0 {main} thrown in /home/tzuovhm/tzuovhm/apps/sharebymail/lib/ShareByMailProvider.php on line 44