Well found it.

In the control.lua the includes of the silo-script changed somehow.
I made a new save game and compared the two files and see the following

correct file

local silo_script = require("silo-script")

broken file

require("silo-script")

I really have no clue how that happend ...

Hi,

Server on 16.6 crashes on player join with error


724.448 Error MainLoop.cpp:1013: Exception at tick 1485741: Error while running event level::on_player_created (ID 24)
....16.6/Factorio_0.16.6/temp/currently-playing/control.lua:17: attempt to call field 'gui_init' (a nil value)
724.450 ...