I bought an Enthoo Primo case. I have had it in use for several days and since yesterday the fan controller doesn't give back an RPM value to my motherboard anymore. It just reads "0 rpm" and the fans cannot be controlled anymore. Another fan I attached to the motherboard directly can be controlled and I have tried attaching the 4-pin fan molex to different CHA_FAN headers on the motherboard without any difference.

Did the fan controller die or is there something else I can try? What might be the cause?

Motherboard: ASUS Prime X570-P