When trying to start the 12.0.5 client it will sometimes after a delay of several minutes crash back to the windows application crash dialog.
if the application does start up attempting to log into existing characters has a high chance of resulting in a Fatal Error dialog:
“Aura 1289789 used in ClientPlayerCondiiton 154767 is not known on the client check your flags and update your DBC”
Attempting to use the in game bug reporting tool is triggering a LUA error:
Message: ...ace/AddOns/Blizzard_PTRFeedback/Blizzard_Reports.lua:132: attempt to index local 'areaIDs' (a nil value)
Time: Fri Mar 13 15:24:03 2026
Count: 1
Stack:
[Interface/AddOns/Blizzard_PTRFeedback/Blizzard_Reports.lua]:132: in function <...ace/AddOns/Blizzard_PTRFeedback/Blizzard_Reports.lua:126>
[tail call]: ?
[tail call]: ?
[Interface/AddOns/Blizzard_PTRFeedback/Blizzard_PTRFeedback_Frames.lua]:782: in function 'SubmitIssueReport'
[Interface/AddOns/Blizzard_PTRFeedback/Blizzard_PTRFeedback_Frames.lua]:718: in function <...Blizzard_PTRFeedback/Blizzard_PTRFeedback_Frames.lua:717>