Render target not working in UI in packaged version of the project

Dear community,

I have an issue with the packaged version of the project and it is about the image assets wich are not part of the project. A simple image is not visible, it is visible in the editor and works fine.

I made a research and it looks like that this issue is already happening in older versions but all their suggested fixes didn’t work for me. Here are my references:

Version of the engine 5.4.3

Any ideas?

Kind Regards,

Tony Lattke