UE4 quits unexpectedly when opening a level

Hello good day. I had a problem with respect to UE4 on the maps when I am going to open a map (one level) unexpectedly UE4 closes.
I have tried:
-Reinstall the engine.
-Use previous versions of UE4 (obtaining the error that projects that have been transformed for later engines can not be opened).
Sometimes when this failure occurs, the UE4 report window starts, sometimes not.
All help is appreciated since I must finish my project.