Hello,

Full error message:
"The mod Electric Train caused a non-recoverable error.
Please report this error to the mod author.

Error while running event ElectricTrain::on_tick (ID 0)
Can't set currently burning to an item without a fuel value
stack traceback:
ElectricTrain/lua/logic_event_handler.lua:77: in function <ElectricTrain/lua/logic_event_handler.lua:55>
stack traceback:
[C]: in function 'newindex'
__ElectricTrain/lua/logic_event_handler.lua:77: in function <ElectricTrain/lua/logic_event_handler.lua:55>
"

I have the same problem, but you can change your mod version to an older one and it should fix the problem, it worked for me