Page builder messes up structure after migration

So i’ve just migrated my website to another server and back then everything was ok, now when i’m trying to change anything page structure, then page builder converts this page to text and asking if it should import this text to page builder or either it does changes literally nothing, it’s like something preventing it from proper working.

I have changed all paths after migration, i’m not using any kind of caching plugin, it’s same on FF/Chrome and i have no idea what else i can try.

Any ideas what might be the issue?

Thanks in advance.