Can not migrate from 4.18 to 4.17.2

I have got an asset from the marketplace that I`m trying to migrate back to 4.17.2. it successfully migrates, all the .uasset files show up in the content folder of my 4.17.2 project but only a few textures and materials are actually accessible in the content browser, no meshes at all. I have also tried copying files directly from the vault with the same results. New to this stuff any help would be appreciated.

Yup. This happened to me when I found out the new SoftObjects addition completely broke the game and prevented packaging. Now I can’t go back and am stuck in such a bad place.