4.4.1 - Project recompile issue: Can't open a project anymore!

Guys, I’m in a big trouble here… I’ve just installed 4.4.1 and now Unreal ask me to recompile a project before open it:


But if click OK I’ll get this message:


And if I try to open anyway, this is what I’ll get:


Now I can’t open this project anymore and I don’t know what to do. Any ideas?
Thanks in advance.

edit: answerhub - Can't recompile a project for 4.4.1 - Platform & Builds - Unreal Engine Forums

I got this issue too. It wouldn’t let me open the VS solution either. I can’t remember the exact error message so I know it’s not particularly helpfully. But I guess it’s nice to know it’s not an isolated issue.

Same issue with unreal tournament via github

I didn’t find a way to fix it yet… I’ve found a workaround though. Another version of the project (a month older) opened in 4.4.1 alright, so I grab all the stuff inside the “content” folder of the actual and compromised project and paste it inside the “content” folder of that old version (replaced all the stuff with same name). Then I could get it to work with minor changes needed.

But I’m very worried about it. Now I need to keep a lot of backup versions just in case I’ll need this procedure again in the future…