Well, a couple a days ago Athom sent out a mail explaining that they would release a new app this week and that you probably have to re-include your qubino devices. But only for those running version v2.0.10 (beta version) of the qubino app.
Those on v1.1.8 (current stable version) prior to this update should not have been affected.
So this was expected.
Also discussed here: Breaking changes in Qubino Homey App?