I am getting travelfailure

Hello i am working on a project at my company. I have built an game for VR environment and i want to make it multiplayer. I used the MultiViewerTemplate as starting. i connected with a server everything works on my computer but when i try to connect a session from another computer it gives the “TravelFailure”

I have already looked on google they suggested some changes on defaultengine.ini file like adding this

“[OnlineSubsystem]
DefaultPlatformService=Null”
line or +NetDriverDefinitions=(DefName=“GameNetDriver”,DriverClassName=“OnlineSubsystemSteam.SteamNetDriver”,DriverClassNameFallback=“OnlineSubsystemUtils.IpNetDriver”) this line but it didn’t worked.

and here is the message log:

TravelFailure: LoadMapFailure, Reason for Failure: ‘Failed to load package ‘/Game/MultiUserViewer/Maps/UEDPIE_0_map’’

. Shutting down PIE.