When i try to open cascade in order to edit a particle system the editor crashes... How do i solve this?

Everything works fine in my project but a few days ago, i wanted to change a particle system and when i tried to open it, the editor crashes.

Hello,

We’ve recently made a switch to a new bug reporting method using a more structured form. Please visit the link below for more details and report the issue using the new Bug Submission Form. Feel free to continue to use this thread for community discussion around the issue.

https://epicsupport.force.com/unrealengine/s/

Thanks