Should be fixed for the next version of 0.15 by disallowing opening that GUI in that state. The GUI doesn't know what it should be editing because there exists a game but the game isn't fully setup with your player when you join a paused MP game.

Yeah the "No local player" looked pretty ...

Sorry for that, here it is

Thanks for the report. This is solved for 0.15.5.

The bug seems to still occur in 0.15.5, see attached log. Seeing as this has been moved to duplicates, did this get mixed up with the following bug report?
https://forums.factorio.com/viewtopic.php?f=7&t=45622

The main difference to that ...

I noticed this fairly weird bug that can be easily reproduced with the following steps:


Player A hosts a game (Using new/load game) and pauses it
Player B joins, game remains paused
Player B opens the options menu and clicks on "Mods"
-> Player B crashes
The following logs (Two for windows ...