I tried this method.
When I clicked to take picture the apps auto closed.
Maybe they need to fix this bug.
Yea its been reported, exactly the same.
Just realised you can create a user from an electrum(or other) privkey too ...
Just goto "import your backup sigIn/Up local account" > Scan backup > Scan PrivKey QR from your desired wallet .. sooo many possibilities would love it to hit github!
There is the possibility of doing the opposite and exporting its private key to another wallet (exemple : electrum,...).