On the PTR currently the Dungeon / Raid icons on the mini map cause errors instantly and are completely non functional.

Soooo basically completely rewrote literally everything about the World Map, completely new API, even going so far as to change how MapID's (that have existed since the dawn of time) work and swapped ID's around and blah.

The World Map has been almost entirely re-written, and all map API was removed. It’s being replaced but we are currently still transitioning. worldMapAreaID, dungeonMapID, dungeonFloor have all been removed and replaced with just uiMapID. We have included a mapping between the old and new data in AddOns/Blizzard_Deprecated/UIMapIDToWorldMapAreaID.lua to help you translate your data.

This is what they provide and it's a heinous abomination. I fully anticipate most World Map related addons are going to suffer a blow during the transition to this expansion.

I sincerely can't be bother doing all that leg work any time soon. Opening this up for potential PR and will be disabling this on the 8.0 branch tomorrow.