Same issue with CleanupLoaders seemingly locking everything up. I'm not sure how it could even fail, but I'm not a good programmer so I probably read decompiled code wrong. And, like others, removing Surface Lights fixed it.
Ah whoops, I missed that SpaceTuxLibrary was required and CKAN didn't add it automatically. It works now, please ignore lmao. Keeping the original post here for posterity.