Every time I try to make a party or join a party better questing is using my uuid instead of my player name.

using BetterQuesting-3.5.271

This is the release version for stoneblock modpack. I tried deleting the game and reinstalling it though twitch. I've also tried deleting the minecraft folder and reinstalling and also deleted all the backup files. Nothing seems to work.

Pretty sure I already fixed this. Can you make sure the BQ version installed is actually the latest first?

Updating to the newest version BetterQuesting-3.5.274 worked. Although I had to type bq_admin edit true to get it to update. Thank you.

Not sure how the in game edit mode has anything to do with updating the JAR file but whatever works for you I guess...