camera shows up black on preview and doesnt track

[keyboardmashing]

it worked the first time i ran it with my usb camera on 0. when restarted it, it was only able to start on 1 and the screen showed up black

i have
deleted the software and re downloaded it

checked the camera to make sure it was working

checked camera privacy settings

deleted camera from device and plugged it back in

tried to use v0.6

unplugged the camera and plugged it back in

and restarted my pc multiple times

im not sure what to do to fix it

[Siver1997]

same with me

i think dev should know this?