How can i fix my meshes from doing this split thingy

Hello I was making a little game until I got a Bsod (blue screen of death, but I don’t know if that has anything to do with it) and when I got back on the engine meshes started splitting up like this I’ve checked if it was a problem with lighting but I couldn’t fix it in any way if you know how to fix it please let me know.

Here is the issue https://i.gyazo.com/4a921d43f0ca6e8f68f0a52c6cb97745z

one other thing in the static mesh editor this issue doesn’t happen

I figured it out I just needed to update my Ue4 to 4.20

your link is broken