Crash, can't open the project. Recreate, still crash

Hi, I’m making a game with unreal 4. 2 days ago when I was working on the last blueprint part, the system crashed. Then I tried to reopen the project, the crash report appeared at 50%.

I have tried to delete saved file and intermediate file, reopen it in MAC system, but it still crashes. Everything goes fine if I open a different project. What should I do?

This are the information in my crash repoter:

You do not have any debugging symbols required to display the callstack for this crash.

Please download the debugging symbols and post the callstack here, otherwise Epic staff can’t help you.