Help, three weeks ago I installed Graphene on my Pixel 8 pro without any problems. Today I wanted to install GrapheneOS on my new Pixel tablet and when flashing I always get this error message.
Failed to execute 'claimInterface' on 'USBDevice': Unable to claim interface , who can help me ???

the problem was solved, I only had to start the bootloader twice and the installation worked perfectly.

You were likely either missing the instructions on working around the fwupd bug on desktop Linux distributions or you had multiple web installer tabs open.