I have tried different versions from one's recommended by other issue threads that I was seeing. I believe the issue is with this mod. I had disabled shaders and kept Optifine in the mob folder. The issue still persists. Worlds when mobs that depend on this library play, immediately causes the world and entire game to crash. If it is not a bug on your end, what do you recommend I do to try to resolve this on my end.
Here's a link to my crash report: https://pastebin.com/3GpmSZFg
Thank you for your time and patience with me in advance!

Nevermind, I saw the mod the main mob was from had an update, and it fixed it. It was not your mod. :)

Offending mod was Ars Nouveau. It had a few updates for the mod itself with new compiled.