question

Trying to get my initial custom server running locally using the latest release of MockVmAgent, version .7, and I get the following error:

C:\Work\PlayFabLocalVM>mockvmagent
TitleId: 3B405060
BuildId: 99551a0d-41f6-475d-ac37-a09517225dc4
VmId: xcloudwusu4uyz5daouzl:WestUs:bd144196-e322-4d5c-aadb-55d2d0d2d84c:tvmps_2af4b6314975432b92e106df5f4ea473fbb21438805044eb98133263dfc44767_d
Mock Agent is listening on port 56001


Unhandled Exception: System.ArgumentNullException: Value cannot be null.
Parameter name: values
   at System.String.Join(String separator, IEnumerable`1 values)
   at Microsoft.Azure.Gaming.MockVmAgent.Program.Main(String[] args) in D:\t2\src\VmAgent\MockVmAgent\Program.cs:line 66
   at Microsoft.Azure.Gaming.MockVmAgent.Program.<Main>(String[] args)

I have tried to modify various values in the MultiplayerSettings.json file to see if I can figure out what it doesn't like. But nothing seems to cause the error to not occur. Here is my settings:

{
    "RunContainer": false,
    "OutputFolder": "C:\\Work\\PlayFabLocalOut",
    "NumHeartBeatsForActivateResponse": 10,
    "NumHeartBeatsForTerminateResponse": 60,
    "TitleId": "3B405060",
    "BuildId": "00000000-0000-0000-0000-000000000000",
    "Region": "WestUs",
    "AgentListeningPort": 56001,
    "ServerStartParameters": {
        "ImageDetails": {
            "Registry": "mcr.microsoft.com",
            "ImageName": "playfab/multiplayer",
            "ImageTag": "wsc-10.0.17134.285",
            "Username": "myUsername",
            "Password": "myPassword"
        },
        "AssetDetails": [
            {
                "MountPath": "C:\\Assets",
                "SasTokens": null,
                "LocalFilePath": "C:\\Work\\MLAPI.Relay.zip"
            }
        ],
        "StartGameCommand": "C:\\Assets\\PlayFabRelayServer.exe",
        "PortMappingsList": [
            [
                {
                    "NodePort": 56100,
                    "GamePort": {
                        "Name": "game_port",
                        "Number": 8888,
                        "Protocol": "UDP"
                    }
                }
            ]
        ]
    },
    "SessionConfig": {
        "SessionId": "ba67d671-512a-4e7d-a38c-2329ce181946",
        "SessionCookie": "MySessionCookieChocolateChip"
    }
}

The OutputFolder has items under it but no actual logs that would help.
I'm stuck now so any ideas on what to look at would be appreciated.
I wish the source code for mockvmagent was public so I could just see what it is expecting and move forward bothering people here. Please post it.