This is caused by "other" mod, but it's not. I have reported it before with other mods.

Reference:
https://mods.factorio.com/mod/UtilizationMonitorBlargh/discussion/601a07ccf5bdb41ee3c4791b

The mod Utilization Monitor (Blargh) (0.8.5) caused a non-recoverable error.
Please report this error to the mod author.

Error while running event UtilizationMonitorBlargh::toggle-utilization-monitor-labels (ID 329)
The mod Circuit HUD V2 (1.1.5) caused a non-recoverable error.
Please report this error to the mod author.

Error while running event CircuitHUD-V2::on_runtime_mod_setting_changed (ID 60)
CircuitHUD-V2/util/global.lua:99: attempt to index a nil value
stack traceback:
CircuitHUD-V2/util/global.lua:99: in function 'destroy_hud'
CircuitHUD-V2/util/gui.lua:276: in function 'reset_hud'
CircuitHUD-V2/control.lua:170: in function 'handler'
stdlib/stdlib/event/event.lua:342: in function 'pcall'
stdlib/stdlib/event/event.lua:362: in function 'dispatch_event'
stdlib/stdlib/event/event.lua:438: in function <stdlib/stdlib/event/event.lua:396>
stack traceback:
[C]: in function 'newindex'
__UtilizationMonitorBlargh/control.lua:624: in function <UtilizationMonitorBlargh/control.lua:623>

I think I have fixed this as well in v1.2, could you please check?

Looks like it's not happening anymore, UMB was updated too though. Consider fixed. Thanks dude!

No problem man!