So out of nowhere Questie doesn't work anymore on my character. I've tried it on other characters and it seems fine, but after I got to Hillsbrad Foothills, the addon stopped worked as intended.

It was working fine at the start of the zone, but then suddenly it stopped. I disabled all addons I have, because no errors were showing up, and I got this one on the screenshot. I already deleted my WDB folder, disabled addons, deleted Questie from my WTF folder, reset the settings but nothing worked. I also searched for answers for this error but found none.

Here's the screenshot:

Hmmm... that error is in the Clustering code. @ZoeyZolotova any ideas on this one?

The arathi basin pvp quests being in there perhaps?

happened to me too

happened the same exact thign whit my charachter after i went to azshara but wahts strange is that whit the others character works fine

It fixed itself after I abandoned all the Arathi PvP Quests

Interesting, "Arathi Basin Mark of Honor!" doesn't exist in Questie. It also doesn't appear on db.vanillagaming.org. Thanks for submitting this bug. Will need to make sure non-existent quests don't break anything.

Fixed for next version.

New beta release is out. It can be downloaded here.