Running a server, and when the Ender Tether intercepts an Enderman's teleport, the server crashes with this crash:

https://pastebin.com/iBWTHnAq

Was this a problem on my end (wrong versions of something?) or what?

Dark Utilities Version: 1.1.8finalrc1
Bookshelf Version: 1.4.4.347
MC Version: 1.10.2
Forge Version: 12.18.3.2297

Nevermind, saw you already made a commit to fix it.