Megascans Trees: Import issues 5.3 and now 5.4

I’ve been having issues with all of these packs when trying to import them into a brand new project. It comes up with a message saying the pack already exists in the project, which it doesn’t. If I by change manage to get the packs into the project, they come in broken, material is messed up turning somewhat grey/white/pink.
I tried converting to VT but that crashed the whole system.
If I am lucky enough to have the materials come in correctly, when dragging an asset into the level, all the assets inside the content folder disappears, except the one I managed to drag into the level.

Any solutions to this that’s obvious and that I am missing?