Made some more test and it seems that it was the map itself that was the issue, launching session is working after deleting the map.
It’s a bug tho, because there was nothing particular in the map (only meshes and pointlight was remaning after I deleted everything that couldn’t validate assets).
Edit: I tried importing my files again and just deleting the map, and it wasn’t enough, I had to delete my materials too and that fixed the issue, I was able to reimport it the “normal way” (Importing the .png files and not the .uasset from another project folder)