Is solder connection good on the coil? That could cause it not to fire if one or more of the terminals has a bad connection.

Any updates on this, can you get the coil to fire if you jump it?
If not you need to replace the coil as there’s likely a break somewhere in the winding, if you can, as said above check the Q7 transistor, but as you said in the WW thread you have 48v present at the coil so that should be good.
Now that I’m thinking about it that could be why it stopped working in the first place, if you go into the solenoid test does the voltage drop to 0 when the coil is supposed to fire or stay at 48. If the transistor is bad it could have locked the coil to on and overheated it causing it to partially melt until it stopped functioning. If that’s the case you’ll need both a new transistor and coil.