Fatal error: Uncaught Error: Class "Sabre\DAV\SimpleCollection" not found in /var/www/illumine/vendor/sabre/dav/tests/Sabre/DAV/Sync/MockSyncCollection.php:17
Stack trace:
#0 /var/www/illumine/vendor/sabre/dav/tests/Sabre/DAV/Sync/PluginTest.php(8): require_once()
#1 {main}
thrown in /var/www/illumine/vendor/sabre/dav/tests/Sabre/DAV/Sync/MockSyncCollection.php on line 17