loss of data from my fortnite map which is no longer editable in the uefn but still playable in the real fortnite.

Hello, I am an island creator on Fortnite. Some time ago, I published an island using Unreal Engine Fortnite, it worked fine, but then I had to reset my computer due to an external problem. After that, when I wanted to open Unreal Editor Fortnite after resetting my computer to edit my previously published island, I noticed that my project had completely disappeared, as if the data of my island had left when I reset my computer. However, it is still playable in the real Fortnite and visible on the creator portal, but not in my projects on Unreal Editor. I wanted to know if there was a solution to this or if it was possible to recover the data of my map in order to put them back on Unreal Editor Fortnite so that I can edit my island. Thank you for your answer.