crash-2019-08-03_16.18.59-client.txt

With only betterportals installed, the game crashes on launch.

Looks like the same error i'm getting, but i do have multiple mods installed
crash-2019-08-04_09.57.00-client.txt

You need to install Forgelin:
https://www.curseforge.com/minecraft/mc-mods/betterportals/relations/dependencies