I mean adding the key, and did what you described (except setting a derivation path, I have single Sig)

But as I said, after scanning the mulit-part QR to 100%, the app just throws me back to the previous screen. I can press continue again, scan again, etc. But the key is never added, it's stuck in a scanning loop

Setting up my first coldcard does anyone have any tips?

A trusted friend gave me his old coldcard v2 (?) and now my day is made.