Ur is not detected please check the connection and reboot this software

I have a UR22C connected on my MacBook Pro 2017 13"
I installed the drivers ok, but the firmware installer fails with
“Error: UR is not detected.
Please check the connection and reboot this software.”

i want use DSPMIXfx but my interface is not detected…

please help meeeeeeee :(:frowning:

sorry for my English I speak French
vous pouvez me répondre en français svp