I am trying to build and test space age 2.0 intersections in test bench. But when I click the rail button with a blueprint in hand I get:
The scenario level caused a non-recoverable error.
Please report this error to the scenario author.
Error while running event level::on_gui_click (ID 1)
LuaItemStack API call when LuaItemStack was invalid.
stack traceback:
[C]: in function '__index'
__level__/control.lua
(...tail calls...)
__level__/control.lua
__level__/control.lua
__level__/control.lua:316: in function <__level__/control.lua:269>
Anyone know how I can fix this?

