So after a brief break from unreal engine, I decided to tackle a project that I was working on. But now when I open the file, and I’ve tried with both 5.5 and 5.6, I get this error message:
“The package ‘/Game/ThirdPerson/Blueprints/BP_ThirdPersonCharacter’ was saved with an older version which is not backwards compatible with the current process. Min Required Version: 214 Package Version: 0”
I don’t get why this happens when I open my project. And this also happens with the backup copy I made. Not only that, but all of my levels are just gone. Not that they’re not in the content browser, but nothing happens when I click them and there’s just a void of black. I’m really worried that I’ve lost all my progress on my project that I’ve spent a lot of time on. 
Can anyone help me out? Why does unreal engine have to be so unoptimized and an absolute nightmare to work with? Yes, I am looking at other engines right now, but I’ve spent a lot of time learning blueprints and I felt like I could at least make something small with unreal. Extremely disappointing.