Fatal error: Uncaught Error: Class 'OC_App' not found in /home/maciej/public_html/maciej/public html/tmp-owncloud1488559413/owncloud/apps/files_external/ajax/oauth2.php:30 Stack trace: #0 {main} thrown in /home/maciej/public_html/maciej/public html/tmp-owncloud1488559413/owncloud/apps/files_external/ajax/oauth2.php on line 30