BUG: Tooltip Item Levels cause errors

[eTzmNcbkrng]

The option to show player Item Levels in Tooltip works fine for people in range and correctly does nothing for ungrouped people who are out of range but has a few pieces of weird behaviour as outlined below.

Group member who is out of range: UIErrorFrame displays "Unknown Unit", this is not a lua error, it just shows red text at the top of the screen. I think the same error is thrown for dead/offlie group members too.

Member of opposing faction: UIErrorFrame displays "You cannot inspect that unit".