Yes, seems like there is something broken after the Z2M update to 2.0.0.
A few minutes ago, damru, the author of the blueprint for the Rodret, wrote that he did a change in the blueprint to fix issues.
I re-importet the blueprint for the Rodret, and now I am able to select a device.
I will have to see about the Ledvance mini, but I guess it’s a similar problem with version 2.0.0 of Z2M.