Same issue here.
HTC Vive Pro with wireless adpater. Only BT in SteamVr USB tab and no camera working. 3 little red "x" testing camera. Before everything worked fine... one day it stopped to work. Needless to say i tried everything: uninstall all, reinstall all, switch back to cabled then swith again to wireless adapter, USB 2, USB 3, USB C with adaptor, no USB HUB, with USB HUB, SteamVr beta, windows update, bla bla bla.
For a so expensvie device HTC should garantee better stability. Bad support, bad testing, bad documentation.
I came from the first HTC Vive and I hoped for a better experience considering the time spent between the two generations. Never more a HTC product. Bye HTC, welcome Pimax.