Fatal error: Uncaught Error: Interface "OCP\Http\Client\IPromise" not found in /home/tzuovhm/tzuovhm/lib/private/Http/Client/GuzzlePromiseAdapter.php:27 Stack trace: #0 {main} thrown in /home/tzuovhm/tzuovhm/lib/private/Http/Client/GuzzlePromiseAdapter.php on line 27