Bug? Progress Bar Fill Image Cleared on Compile

I added a progress bar to my user widget, when I select a fill image for the progress bar and compile the image is cleared, is this a bug or am I missing something?

The material is invalid.

Have you tried testing this with a default material?

It happens with any material that assign to the Fill Image.

If it happens with default materials, then I would suggest either REINSTALLING or VERIFYING the Unreal Files to make sure that the source files are not corrupt.

There is a very similar (assuming this is a bug) situation with MetaHuman grooms unloading by themselves.

Thank you for the info ill dig in a bit further.

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