How do I fix this "missing modules" error?

Development Programming & Scripting Blueprint
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1

I’m working on this project, and this error has come up twice. Once it happened after i tried to recompile after changing some blueprints, and when i restarted I got it. Luckily I had a backup so i just started from there, but the same error eventually came up, but I hadn’t really done any changes. I just left my work station for a while, and when I came back to resume it was this error.

I am pretty new to Unreal, but any help is appreciated. Heres the error message:

http://puu.sh/nbzJr/b4eb781edf.png

2

Did you find a solution to this? I’m having the same thing happen to me and I’m tired of losing progress.

3

Do you use 2 versions of engine?