I find that when JobControl crashes, swapping the laser cutter to a different USB sorts the problem temporarily. Sometimes have to swap several times in a session. Also, reducing the resolution may help.
Yes there has been many threads on issues with inkscape to job control - I don’t think there was a conclusive action plan.
As @TomHedges mentioned try dropping the resolution as a first option. Rebooting changing usb cable second, try to hide your frustration, wipe your tear and try option 1-2 again.
I think it’s something do with how the file is made or saved originally that can cause issues. I haven’t had any problems for a while. I Would also check preferences are not set to someones name.