Getting an issue with Questie when setting ranks in my guild, it creates an error and if i click ignore, then it sets any changes to the guild master. I have to disable questie to make any changes to the guild ranks.

Seems familiar. Please make sure that:

1. you are using the latest version of Questie (4.0.12 currently).
2. Questie is the only addon enabled when this bug occurs.

Assuming you already created your guild we will try to reproduce on our own.

Someone else had this issue when trying to leave a group, but it stopped happening after /reload

Not sure what causes this to happen as questie doesn't touch the guild or group UI

This issue was been fixed with 1f33a36 .