Building not working

Summary

I Deleted the grid plane and then built for 2 hours. When i launched a session and tried it out i couldnt build i searched it up here and somone got the solution by adding a gridplane. It worked but when the builds resat my whole map got destroyed (It happened the same way as if you chop something it all came down one by one). I just closed Uefn and reopened it so everything was still there but the builsing still dont work. If I add the grid plane the same happens again.

Please select what you are reporting on:

Unreal Editor for Fortnite

What Type of Bug are you experiencing?

World Building

Steps to Reproduce

Delete the grid plane, Save all, Close Uefn and reopen it!

Expected Result

Being able to add the grid plane so i can build

Observed Result

Everything breaks like if you chpped the builds so it fell down one by one

Platform(s)

Windows

Island Code

341697604349

Additional Notes

Please Fix🙏