Error while running event Kux-LogisticsCenterCS::on_ gui_ .closed (ID 88)
LuaEntity API call when LuaEntity was invalid.
stack traceback:
[C]: in function ' index'
..terCS_. /logistics_ center/logistics_ center . controller.lua: 110: in function
'update'
..er... /logistics_ center/event_ handler/on_ gui_ closed.lua:16: in
function ...terCS /logistics_ center/event_ handler/on_ gui_ closed.lua:6>

I could not understand why an entity was reported as invalid. The error never occurred in my saved games. so I could not reproduce the crash.