Not sure what error you're looking for, but it generated the QR code with mulll (a Firefox fork) using nos2x-Fox.
Discussion
Ah, okay, interesting. 🤔
I've heard that mull gives fewer errors than Firefox does.
Not sure if this is a problem with graphene or not, but I can never seem to get amber to work as an nsec bunker on graphene. It works on my Samsung tablet though, that's unmodified.
These are the errors I received.
