Animation retargeting in ue5.4.4 is broken after export

I created a retarged skeletons and in the preview the animation works. After exporting the animation does not work, why? Here is a video with the procedure

Thank you for any help!

Hey,

just encountered the same problem. You using the Polygon animations from the Synty-Store and retarget them to the other Polygon assets?

Do you have solved the problem?

Does have anyone an idea how to solve that?

Thanks for any help!