Possibly a mod conflict, if you have other mods installed.

You should have a look at the logs as described in point 4 here:
https://psteamcommunity.yuanyoumao.com/sharedfiles/filedetails/?id=569681601

Then post any errors here.

I have only your mod installed.

However is it possible your mod can't work with "Users" folders with non-standard characters? When I open the lua.log I can see multiple error messages like this:

***

[41642.593] Runtime Error: Error opening/reading C:\Users\Alea\Documents\My Games\Sid Meier's Civilization Beyond Earth\MODS\[COLOR_CYAA][COLOR_CYAN]Codex[ENDCOLOR][ENDCOLOR] (v 7)\Lua\Maps\Inland_Sea.lua.
stack traceback:
[C]: in function '(anonymous)'

***

My real User name folder is C:\Users\Aleš.

If this is the case can you see any solution other than renaming my Users folder, which I'm not even sure I can do in Windows 10? Thanks man.

You can change your user name and it should rename the folder automatically, but other than that no, I'm not aware of a solution.

So it was because of that stupid folder. I had to create a new account and login in that. Sheesh.

The mod is fantastic btw, an incredible job. Firaxis modders are the salt of the Earth. And if you add more promotion types for units, Civ5 style, it'd be even better. The constant +10% combat was one of the dullest things about the vanilla.

Thanks. :) And I'm glad you managed to solve the problem, even though it seems to be a rather inconvenient solution!