In the X40_webinterface I click an album, and I choose "ADD COVER". (in Kontextmenü ich wahle "cover hinzufügen")
A popupscreen appears with just 1 option-button: BACK (nur 1 Knopf: zurück).
I cannot choose any source for a cover (keine Bilddiensten, auch nicht "Von Festplatte"); gar nichts.
This is since today; until yesterday it functioned. Gestern funktionierte es noch.

Please install the current Beta-Version or wait for a few days, until we release the new firmware. Also you should Reinstall the Webserver after the Update!