So I tried to put my file on the internal hard drive of my new PC, and when I opened it, I saw the map, which had lost a few elements - some parts had been deleted. On the other hand, I’m on my map, but I can’t launch the session. Here’s the error message, in case the screen isn’t very visible:
LogValkyrieSyncProject: Error: Failed to find public assets [Failed to read C:/Program Files/Epic Games/Fortnite/Fortnite UEFN/cache_cache/Plugins/cache_cache/Content/ExternalActors/cache_cache/1/RQ/DE8I03Q92RFO2ZLDTSJTFH.uasset].