Canon R5 and C1 both crash with tethering.

I'm testing it out C1 right now on Wondows 11

But. I have problems with tethering and Canon R5 on Windows 11.
At first, the camera is visible. Then, suddenly it disappears. If I turn of camera, and start, it pops up again.
Also, sometimes it totally freezes up and C1 crashes. After that, my camera is broken untill I remove the battery. It freezes up. I cant do anything. I I try to turn it off, the displays stays on. Until battery is removed.

I tried different usb-cables. Same problems every time. What is going on here? Anyone else had this problem?
Please advice.

Thanks!