The only mod I have installed is better advancements. Not Sure what's going on, the crash report says there's no such method minecraft.getInstance, though I'm assuming it's something deeper, since it appears no one else has had this issue. I'm going to try an earlier version of the mod.
crash-2019-11-24_03.08.40-client.txt

What version of Better Advancements are you using? It kinda sounds like you're using a deobf build in an obfuscated environment.

I was using the latest better advancements from the curse forge page I believe, v0.1.0.93, when I tried v0.1.0.90 it worked fine.

Actually I'm not sure how I ended up with .93 as the latest on curseforge is .90

.93 is the latest alpha, .90 is latest beta

Is this still an issue?

Closing due to no response