9.1.5 “Lua Errors” after changing UI

After moving my characters Profile & Target to my preferred location directly above my Toolbar.
I get these Lua Error Messages when mounting another players “Multi Passenger Mount” or a “Quest Giving Mount”:

With No Addons Installed: “Your AddOns…Lua errors…”

With Addons Installed:
Lua Error – Interface\FrameXML\AnimstionSystem.lua:61:… PlayerFrame:SetPoint.

Lua Errors Linked Files:
No Addons: https://www.dropbox.com/s/ug5ppskry1y2dbd/WoW%20Lua%20Errors%20(No%20Addons).png?dl=0

With Addons:

I am getting this same error, and I have no add ons running as well. Tried repairing and it didn’t do anything. :frowning: