WoWInterface - Random lua error on Blizzard

Getting this only after a real logon (not a /reload) when I click at the Class Hall Report at the minimap.
Also tested without any 3rd party mod enabled.

Lua Code:

Message: ...Blizzard_GarrisonUI\Blizzard_GarrisonLandingPage.lua:243: SetPortraitToTexture(): Texture is not 64x64 pixels: FileData ID 167095.
 
Time: 07/14/16 14:35:01
Count: 1
Stack: [C]: in function `SetPortraitToTexture'
...Blizzard_GarrisonUI\Blizzard_GarrisonLandingPage.lua:243: in function <...Blizzard_GarrisonUI\Blizzard_GarrisonLandingPage.lua:241>
...Blizzard_GarrisonUI\Blizzard_GarrisonLandingPage.lua:323: in function `GarrisonLandingPageReport_GetShipments'
...Blizzard_GarrisonUI\Blizzard_GarrisonLandingPage.lua:209: in function <...Blizzard_GarrisonUI\Blizzard_GarrisonLandingPage.lua:207>
 
Locals: (*temporary) = <unnamed> {
 0 = <userdata>
}
(*temporary) = 167095