itch.io

You can refer to the github file in this link.

https://github.com/yairm210/Unciv/blob/master/android/assets/jsons/Civ%20V%20-%2..

You can mod nukes if you'd like.

I can't see it clearly but I believe you do not have access to the internet. Make sure you are connected to it to be able to download mods.

The mod is outdated, the problem lies on the developers of the mod.