You have a dependency on a deprecated mod (arachnids), but I think there is a new one, idk if it's exactly like the original.

Edit : okay, you should just replace the dependency with the new mod, cause it works with it, and it would be less confusing

Most likely, in one of the future releases I will move the graphic files from Arachnids inside the mod and remove the dependency

It actually does not work like it did in 1.1. Rather than the "Arachnids Rampant Fixed Faction" using the gfx, you instead have the actual Arachnids Enemy force. It technically loads and plays just fine, but not the way it was intended to work with Rampant, Fixed. So the dependency should either be removed or updated.