It seems that Forge had change something essential several mods are crashing, so does this mod:

"https://pastebin.com/QCjwGULs"
thanks for the update to 1.12 anyway :-)

I can confirm this crash as well!
https://gist.github.com/P3rf3ctXZer0/e59419909de706fd0d4360330ddc630b

@Ivorforce You did, its currently listed as 1.12 for some reason, when looking at the code alone, it has no support for 1.12.

I mentioned in #223 that there's a 1.4.1 for MC 1.10 and 1.12, but not 1.11 . I thought perhaps 1.11 needed more work and was happy for progress on 1.12. ;)

File is properly listed as 1.11 in curse now.