HTTP500 Error when enhancing Sceen for xbo

Hello,

I have a Problem when enhancing the Screen for a xbo.

The Studio sends a Popup with a HTTP 500 internalServerError message.

Every Item is activated and no other Error is displayed.

The problem is in every Solution. We are on Version 1505.

I opened an incident, but maybe anybody can help me here.

Thanks

and best Regards,

Astrid