No USB connection in Kucher after Telega v1 update

I used the DroneCAN GUI Tool to upload the v1 firmware to Myxa (v1.2).
Afterwards I tried connecting the Myxa to my PC (Windows and Ubuntu) via USB, but no connection could be made.

Any ideas where the problem might be? It works perfectly fine with v0.6

Kind regards

Telega v1 does not support USB because this interface is ill-suited for power electronics. Please proceed here for the getting started instructions: