I added this mod, and now when I try to generate a world it gets stuck on generating terrain.

Not sure why my mod would do that. I don't add in any terrain generation to it. Sounds like its some how interacting with another mod. This mod has been out for some time at its current version and is in a lot of large packs. With out error logs and the such there is no way to know whats causing the issue. I would need a lot more information as I cant recreate an issue like this.