Great mod! Unfortunately experiencing crashes when removing/deconstructing unloader after recent factorio update:

Error while running event railloader::on_player_mined_entity (ID 65)
LuaItemStack API call when LuaItemStack was invalid.
stack traceback:
[C]: in function 'insert'
railloader/control.lua:250: in function <railloader/control.lua:243>
(...tail calls...)

I do use a bunch of mods, but this was the removal/deconstruction of an unused unloader. Happy to help if further info is useful!

Same here, just got the error while trying to remove it by hand or bot.

148.820 Error MainLoop.cpp:1031: Exception at tick 14046292: Error while running event railloader::on_robot_mined_entity (ID 64)
LuaItemStack API call when LuaItemStack was invalid.
stack traceback:
[C]: in function 'insert'
railloader/control.lua:250: in function <railloader/control.lua:243>
(...tail calls...)
148.820 Error ServerMultiplayerManager.cpp:96: MultiplayerManager failed: "Error while running event railloader::on_robot_mined_entity (ID 64)
LuaItemStack API call when LuaItemStack was invalid.
stack traceback:
[C]: in function 'insert'
railloader/control.lua:250: in function <railloader/control.lua:243>
(...tail calls...)"
148.820 Info ServerMultiplayerManager.cpp:698: mapTick(14046292) changing state from(InGame) to(Failed)

Same problem on our Server :(