Why does packaging crash on mac when the project contains Media Framework?

I have got some mp4 files loaded into my project and created materials from it. Since I did this, it´s completely impossible to package the project on mac. It ends up with a crash every time.

I really need a solution for that, because my current project is heavily depending on this movie-meaterials! And I need a mac-build at the end.

I have attached the log file to this post.

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