[0.17.79] - Editor crashes with Error event level::on_player_created (ID24)

[LevArris]

Hi there,
sorry in advance, I'm not a native speaker.

My Issue:
I try to convert my Save (doesn't matter if its out of the gui or by map2scenario). This seems to work without errors.
But when I try to load the converted scenario the Editor shows parts of the map in the background but crashes with an error:

Error while running event level::on_player_created (ID24).
... [Roaming-Path]..../currently-playing/control.lua:17:attempt to call field 'gui_init' (a nil value)

The only reference in the above mentioned lua-Script to "gui_ini" has these line:

silo_script.gui_init(player)
{/quote]

which is line 17

See the Attachement for the full Error-Message.

Does someone know this problem and can help?
I have hundreds of hours in this save and id would be nice if I can use it in the future...

Kind regards from Germany