I had this issue multiple times. Install Better Log or enable the DEV Mode, so you can see the red error that will certainly pop and have an idea which mod is causing.

But based on my experience, it's either incompatibility or issues with load order. I only solved when I trimmed down my mod list. More mods, mean more load order issues. Also, I use RimSort, latest version with all databases up-to-date... I strongly recommend it.

I'll use rimsort, I've been using rimpy but I've heard it's not fully up to date so maybe the sort isn't right on it.

Originally posted by Goatrocity:

I'll use rimsort, I've been using rimpy but I've heard it's not fully up to date so maybe the sort isn't right on it.

Just be sure to get the latest version and download both databases of rules, it will help a lot.

I found the mod causing the issues. [LTS] Biospheres or something like that. I took some others off too and then slowly added back so I think I'm good now, lol. I have a feeling the biospheres may interfere with something when the DLC drops.

Originally posted by Goatrocity:

I found the mod causing the issues. [LTS] Biospheres or something like that. I took some others off too and then slowly added back so I think I'm good now, lol. I have a feeling the biospheres may interfere with something when the DLC drops.

Oh yeah, that mod broken as 'ell in 1.6, but the author won't remove the compatibility tag.