im not sure what is causing this crash, but my guess is likely incompatibility with a mod. this was an extremely promising mod that i was excited to add to my personal modpack, but sadly there was an issue, as when i created a world, it crashed before i spawned. the crash report is below, i hope you can help!
https://pastebin.com/mWeVhfZz

Not sure what's up with this, don't think I can help you here.