Copter-4.0.1 - Orange Cube no RTK fix with the Sirius RTK GNSS Rover (M8P) from Drotek

I have a Sirius RTK GNSS Rover (M8P) from Drotek and I don’t get an RTK fix on GPS1 and I get an RTK fix on GPS2. The magnetometer LIS3MDL does not work either.
I have also tried the DP0503 RTK GNSS (XL M8P) from Drotek and have the same result.