Bullet v1 starts up with high drum temp

This just started happening today – when I plug in my v1 bullet, it starts up reporting a drum temp of 200F (on the device display) even though it is stone cold. It seems to be booting up in “charge” mode (see roastworld screenshot) presumably due to the reported temperature, even though I haven’t started a roast yet.

Thinking this may be a roastworld / firmware incompatibility, I tried updating firmware, and the window looks like this – ‘Start Firmware Update’ is disabled and I can’t click on it.

Any ideas? Thanks all.

Apologies, I neglected to say, I cannot start a roast because of this – the machine is locked in charge mode.

Some additional information: I am using Roastime 4.14.3, and I can’t really tell the firmware version (see screenshot above). I believe the software may have updated today when I started my laptop, which is what got me thinking about firmware incompatibility, but that’s just a guess.