Nuki Door Opener 2.0 - Elcom HAT-402

Hello People,
we just received the NUKI opener 2.0, which is compatible with our Elcom HAT-402. We wired everything as the App dictated.

Now it does not work. We tried to open the front door, as guided by the app, but it simply does not react. Is there something wrong with our wiring or our setup?

Thank you in advance!