Hello 👋 longtime GrapheneOS user here. Been using it for over a couple years on a Pixel 7. Installing on the 7 was not an issue at all. But I'm having trouble with the 9. I unlocked the bootloader and all that, but when it comes to connecting the phone to proceed, I get an error message stating that no device can be found. But the phone shows to be connected in my file manager, and I have access to it.
Not sure what to do. I've gotten this error message on macOS and Linux(Fedora 41). I tried using Chromium and Chrome. Also tried Firefox, no luck. Any suggestions would be greatly appreciated.

Make sure that you plug your phone in only after you have booted into the bootloader interface.

I remember a while back there were odd issues popping up with web installs with chrome mostly. The work around mentioned in Matrix and here was to use Edge browser for the install.

No clue if that'll help here but just thought I'd mention it