Blender fails to open mesh when opening a 2.82 mesh into 2.7

Just as it sounds like, I just completed a majority of my CC including the UVs, data transfer, etc. I go to transfer my mesh back into 2.7, making sure to not load UI because that guarantee crashes, and it says it's loaded but it's not actually there. This is my first CC so I can't tell if I'm being dumb or not, but it's about my 9th attempt and I'd always get stuck on this part because blender 2.7 would be temperamental. Anyone know a fix for this? No idea how to add images to this post.

(Edit: I got everything into blender 2.7 by appending everything in, I'll see how this goes for now.)

(Another edit: It worked miraculously :D I finally completed the mesh