My project crashes when I try to launch it

When I was using the erosion tool it happened this and now it doesn’t want to restart anymore. I tried to restart my computer, but no success.
I can open other projects. What do you think I should do?

Hello,

This is currently a known issue that is fixed in 4.13. You can also grab the commit that you can merge into your engine if you are using source: Unreal Engine Issues and Bug Tracker (UE-32774)

Have a great day!