see pastebin below for full error log. upon loading minecraft the game crashes quite quickly. I'm not sure what's going on fully, but this is the first time my modpack I've been working on has crashed in a few seconds like this, I'm unsure what is causing this.

https://pastebin.com/H81wcWUu

upon a heavy amount of testing it seems that the issue is with the mod Reach Fix. Which is rather annoying as that, spartan weaponry, and better survival are important parts of my modpack. And according to the devs on Reach Fix it's an issue on your end that they cannot fix.