RTK not converging with 300 RTK and D-RTK2

Hi I’m using a D-RTK2 base station and a DJI 300 RTK but the connection is not converging and I cannot undrstand the reason. I tried different open spots but same result.
Here are the versions of the firmware installed on the base station, the rc and the aircraft.

Installed version: V03.01.0000

M 300 RTK - radio controller
Installed version: 07.00.0101

Installed version: 07.00.0100