Ue4 crashes when trying to open fortnite game

I am unable to open my fortnite game please can any one help me i followed all the youtube troubleshooting step but still issue is not resolved.

Hello,

For Fortnite issues, please visit http://fortnitehelp.epicgames.com/

There you will find various troubleshooting articles as well as an Email Us button that you can use to get in touch with one of our support staff who can assist you further with this.

Thanks