[Solved!] Unable to install Ubuntu 22.04 from USB

Hiya! I have a known good Ubuntu 22.04 USB that has worked on other devices, but when I try to install it on this PC I get a blank screen with “stdin: Invalid argument” repeated 30 times or so, and at the bottom it says “Unable to find medium contained a live file system” and then attempts to boot from URL. (For some...