Every time I’ve tried to play arena since 11.1.5 I’ve gotten spammed by an LUA error message, even when I hit “ignore” it immediately pops back up. I’ve reduced my addons to bare essentials but it’s still happening. Is there a way to block this entirely? What’s the fix?
UI reset. It might not be an addon on it’s own, but bad cache data from a Blizzard UI element as well.
Get rid of even more add-ons? Getting rid of them is part of the UI Reset linked above.
If fully removing (not just disabling) all add-ons gets rid of the message then you know it’s likely from that. You can start adding them back one by one until you find the culprit.