Nevermind. It appears that this has nothing to do with Do a Barrel Roll. After disabling this mod others got flagged. Sorry!

Describe the issue
Can't load or create a world as I am met with this:

Crash report/logs (if applicable)
Log: https://mclo.gs/JPimhfm (don't get scared lol, it's just resource pack spam)

Additional information
This happened after updating a bunch of mods, I was unable to determine the exact cause of this however.