The addon is completely broken on the PTR and just has endless lua errors. I imagine this has to do with the new loot system they added that rewards 10 man naxx/os/eoe gear in heroic dungeons and possibly due to the increase item level of ulduar gear. Just wanted to make sure this is a known issue so it can possibly be fixed b4 P2 goes live.

This is not a data issue.
They are porting some API back from the 10.x client (dragonflight) into Wrath and this will break a bunch of addons.

Lag123 has recoded AtlasLoot for Dragonflight, maybe we can use that code to update this for 3.4.1