Here's another error I'm seeing with 7.0.3.9. It occurs upon log in with the addon enabled. It also opens a blank artifact window. Disabling and reenabling the addon while logged in does not repeat the error. Loading screens does not cause the error. Seems to only take place at log on.
Code:
Message: ...e\AddOns\Blizzard_ArtifactUI\Blizzard_ArtifactUI.lua:41: attempt to compare number with nil
Time: 10/06/16 13:01:32
Count: 1
Stack: ...e\AddOns\Blizzard_ArtifactUI\Blizzard_ArtifactUI.lua:41: in function `ArtifactUI_CanViewArtifact'
...ddOns\Blizzard_ArtifactUI\Blizzard_ArtifactPerks.lua:680: in function `EvaluateRelics'
...ddOns\Blizzard_ArtifactUI\Blizzard_ArtifactPerks.lua:541: in function <...ddOns\Blizzard_ArtifactUI\Blizzard_ArtifactPerks.lua:539>
[C]: in function `SetShown'
...e\AddOns\Blizzard_ArtifactUI\Blizzard_ArtifactUI.lua:172: in function `SetTab'
...e\AddOns\Blizzard_ArtifactUI\Blizzard_ArtifactUI.lua:138: in function `EvaulateForgeState'
...e\AddOns\Blizzard_ArtifactUI\Blizzard_ArtifactUI.lua:70: in function <...e\AddOns\Blizzard_ArtifactUI\Blizzard_ArtifactUI.lua:67>
[C]: in function `Show'
Interface\FrameXML\UIParent.lua:2336: in function `SetUIPanel'
Interface\FrameXML\UIParent.lua:2154: in function `ShowUIPanel'
Interface\FrameXML\UIParent.lua:2048: in function <Interface\FrameXML\UIParent.lua:2044>
[C]: in function `SetAttribute'
Interface\FrameXML\UIParent.lua:2830: in function `ShowUIPanel'
Interface\FrameXML\UIParent.lua:1466: in function <Interface\FrameXML\UIParent.lua:891>
Locals: (*temporary) = nil
(*temporary) = false
(*temporary) = "attempt to compare number with nil"