Async loading code error

Heya, i packaged a map mod for a game and when trying to host it on a server it gives me this error:

Log of all the process

For lazy souls here’s the error in se:
0]LogLoad: LoadMap: /Game/Gondwana_Isla/Gondwana_Isla?Name=Player?game=Sandbox?MaxPlayers=20
0]LogStreaming: Error: Couldn’t find file for package /Game/Gondwana_Isla /Gondwana_Isla requested by async loading code. NameToLoad: /Game/Gondwana_Isla/Gondwana_Isla
0]LogStreaming: Error: Found 0 dependent packages…
0]LogLoad: Error: Failed to enter /Game/Gondwana_Isla/Gondwana_Isla: Failed to load package ‘/Game/Gondwana_Isla/Gondwana_Isla’. Please check the log for errors.

What could cause that?

/Game/Gondwana_Isla/Gondwana_Isla → Is the project map