You can disregard anything ItemDisplayWindow related error messages. However, your PlayerWindow has issues. It seems to me you're missing a bunch of <ScreenID>
For example, in default:
Code:
<Label item="Player_HPLabel">
<ScreenID>HPLabel</ScreenID>
<EQType>19</EQType>
but in yours:
Code:
<Label item ="Player_HPPercentage">
<ScreenID>HPPercentage</ScreenID>
<EQType>19</EQType>
<ScreenID>HPPercentage</ScreenID> should be changed to <ScreenID>HPLabel</ScreenID>
Match the rest of EQType with proper ScreenID and you'll no longer get the error.