Many thanks, I'll give that a try.

Anyone know how to fix this error? I'm on linux, removed all other mods, so it's just DyWorld. I've unziped it and the file it said is missing, is not missing at all.

What version of Factorio does this work with, the forum title says 0.14.x, the mod says 0.15.x, I'm using 0.15.30 and it does this:
http://imgur.com/a/jHhDl
*Update: How do I get older versions? I've got 0.15.27 (oldest experimental version) and that gives the same error.

Its been fixed. Yhe ...

What version of Factorio does this work with, the forum title says 0.14.x, the mod says 0.15.x, I'm using 0.15.30 and it does this:
http://imgur.com/a/jHhDl
*Update: How do I get older versions? I've got 0.15.27 (oldest experimental version) and that gives the same error.

Thank you, seems fine on Windows, so I'm guessing it's an issue with case sensitive filenames on Linux. I get that problem a lot with other multi-platform games. :)
Not sure if this is the right place to mention this, but it would be nice to be able to install lots of mods in one go and THEN ...

Here you go...

Thank you for the report, if the API call fails in 0.13.1, it shouldn't crash the game.

Downloaded 0.13.1 today (29th June) crashing to desktop when browsing the mod portal, log says:

17.605 Factorio initialised
20.873 Info HttpSharedState.cpp:42: Downloading https://mods.factorio.com/api/mods ...