How can I fix the D3D crash?

Hello,
While playing Fortnite the game crashes and the Unreal Engine crash reporter appears.
I uninstalled Fortnite and the Epicgames Launcher and reinstalled both but nothing helped.
It says:
Unreal Enginge is exiting due to D3D device being lost.(Error: 0x887A0006-HUNG)"
FortniteClient_Win64_Shipping"
I Have no clue what to do to fix it so i hope somebody can help me here.
Thanks!!!

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