SMB/CIFS mount not working on 16.0.6 or 17.0.1, works on 15.0.13

[smeijer]

Adding external SMB storage does not work after update to 17

This issue is described here (in german): Externer Speicher immer Rotes Schild. Here original post: https://github.com/nextcloud/server/issues/17846 In SMB.php after following entries: (new DefinitionParameter('timeout', $l->t('Timeout'))) ->setType(DefinitionParameter::VALUE_HIDDEN) add following entry: ->setFlag(DefinitionParameter::FLAG_OPTIONAL),