3893.136 Error MainLoop.cpp:1285: Exception at tick 8874342: The mod Factory Inspector (1.1.5) caused a non-recoverable error.
Please report this error to the mod author.

Error while running event factory-inspector::on_tick (ID 0)
LuaEntity API call when LuaEntity was invalid.
stack traceback:
[C]: in function 'index'
__factory-inspector/script/production-tracker.lua:35: in function 'updateProductionAndConsumptionStatsAM'
factory-inspector/script/event-handlers.lua:45: in function <factory-inspector/script/event-handlers.lua:15>

Which mod is this referring to please?
Does it always happen when removing the depot, or just sometimes?

Refers to Transport Drones. Sometimes. https://litter.catbox.moe/ks2rsa.zip Can be induced here by reenabling mod and playing with transport drone depots wiring.

Thanks, I'll do some digging.

Мод Factory Inspector (1.1.9) вызвал неустранимую ошибку.
Пожалуйста, сообщите об этой ошибке автору мода.

Error while running event factory-inspector::on_tick (ID 0)
LuaEntity API call when LuaEntity was invalid.
stack traceback:
[C]: in function 'index'
__factory-inspector/script/production-tracker.lua:35: in function 'updateProductionAndConsumptionStatsAM'
factory-inspector/script/event-handlers.lua:45: in function <factory-inspector/script/event-handlers.lua:15>

p.s.-The same problem, I decided to remove the supply depot (red) and gave this error.
The error appears only at 1 supply depot with proteins and iron (melted)