Thank you for the prompt response! I followed your instructions and changed the name of the flash.cfg file, rebooted cleanly. At startup, I saw the main tab populate with all of my disks, but then a few seconds later the main tab reverted back to the blank page I showed before. Attached is an updated diagnostics. However, I am no longer getting an error banner stating that the USB drive is corrupted. I will take better care to backup my config next time. I'll look into Unraid Connect for that purpose!
tower-diagnostics-20261008-1114.zip