I've been having issues with modded rimworld since 1.5 launched. after a lot of tries and help form the community I started to filter mods that cause the game to not work.
Now after removing small tweaks for this mod, sometimes it started sometimes it didn't, I removed this mod and now the game runs and I'm not bombarded by errors in main menu.
To be honest I think this mod also requires a rework like Insectoids.