Fatal error: Uncaught Error: Class "OCP\AppFramework\Db\QBMapper" not found in /home/ally/mittondev/temp/nextcloud/lib/private/Updater/ChangesMapper.php:37 Stack trace: #0 {main} thrown in /home/ally/mittondev/temp/nextcloud/lib/private/Updater/ChangesMapper.php on line 37