Error when creating a steam session

Hi
when creating a session in my Unreal Engine 5.5 project with the Advanced Sessions plugin, the following errors occur:

LogNet: Error: UEngine::BroadcastNetworkFailure: FailureType = FailureReceived, ErrorString = Host closed the connection., Driver = Name:GameNetDriver Def:GameNetDriver IpNetDriver_1
LogNet: Warning: Network Failure: GameNetDriver[FailureReceived]: Host closed the connection.
LogNet: NetworkFailure: FailureReceived, Error: ‘Host closed the connection.’
LogNet: UNetConnection::Close: [UNetConnection] RemoteAddr: 127.0.0.1:25600, Name: IpConnection_0, Driver = Name:GameNetDriver Def:GameNetDriver IpNetDriver_1, IsServer: NO, PC: PlayerController_1, Owner: PlayerController_1, UniqueId: NULL:HOME-PC-0D04A6CE447D91021DDD678DF6A1B7EF, Channels: 11, Time: 2025.03.24-18.24.35
LogNet: UNetConnection::SendCloseReason:
LogNet: - Result=FailureReceived, ErrorContext=“FailureReceived”
LogNet: UChannel::Close: Sending CloseBunch. ChIndex == 0, Name: [UChannel] ChIndex: 0, Closing: 0, RemoteAddr: 127.0.0.1:25600, Name: IpConnection_0, Driver = Name:GameNetDriver Def:GameNetDriver IpNetDriver_1, IsServer: NO, PC: PlayerController_1, Owner: PlayerController_1, UniqueId: NULL:HOME-PC-0D04A6CE447D91021DDD678DF6A1B7EF
LogNet: Error: UEngine::BroadcastNetworkFailure: FailureType = ConnectionLost, ErrorString = Your connection to the host has been lost., Driver = Name:GameNetDriver Def:GameNetDriver IpNetDriver_1

It should be noted that the old build of the project worked perfectly without errors. However, after recreating the project with the same settings, this problem started to occur.

I would appreciate any help regarding this issue. Thank you!