QR code scanning troubles

I had this same problem, and it wasn't a false alarm. As described the desktop app paused briefly before reporting "qr code detection failed" and the web extension as used in Jack's screenshot reported "no qr code found for 2fa" (1Password for Mac 8.8.0, Chrome 103.0.5060.134, extension 2.3.7). 1pass had permission for screen recording.

I was able to use my phone, and add the field there with the camera pointed at the very same desktop screen.