meshs corrupted after ue4 crash

Hello, i started my projects 1 week ago and i just had a crash while deleting a widget
when i start the project it’s like this :

and when i close and open again its like this ;

i don’t understant

anyone of you already had this? someoen know how to fix ? i’m new sorry for bad explain


fixed ! it was the clipping plane set to 0 never do that aha