question

I'm stumped on this. I've been following this tutorial really closely because I'm trying to do something very similar, but everytime I call my first function I get an "InvalidSharedGroupId" error back.

This is my CloudScript function:

handlers.postToStory = function (args) {
    try {
        var getRequest = { SharedGroupId: args.sharedGroupId, Keys: [ "posts" ] };
        var gameData = server.GetSharedGroupData(getRequest);
        log.info(gameData);
    }
    catch (e) {
        var msg = JSON.stringify(e);
        log.info(msg);
    }

// it errors out by this point...

}

Here is what I'm calling from the client (I'm working in C# / Unity):

private void SubmitPost(string text)
    {
        PlayFabClientAPI.ExecuteCloudScript(new ExecuteCloudScriptRequest()
        {
            FunctionName = "postToStory", 
            GeneratePlayStreamEvent = true,
            FunctionParameter = new { 
                sharedGroupId = _sharedGroupId,
                postText = text
            }, 
        }, OnSubmitPost, OnErrorShared);
    }

("_sharedGroupId" is a value I've cached on the client after calling "CreateGroup" to make a new group)

The error I get back is:

{
   "cloudScriptErrorCode":"CloudScriptAPIRequestError",
   "stack":"Error\n    at Object.server_request (Script:180:24)\n    at Object.server.GetSharedGroupData (Script:552:75)\n    at handlers.postToStory (MY_GAME_ID.js:373:31)\n    at Object.invokeFunction (Script:116:33)",
   "apiErrorInfo":{
      "api":"/Server/GetSharedGroupData",
      "request":{
         "SharedGroupId":"MY_SHARED_GROUP_ID"
	},
      "result":null,
      "apiError":{
         "code":400,
         "status":"BadRequest",
         "error":"InvalidSharedGroupId",
         "errorCode":1088,
         "errorMessage":"InvalidSharedGroupId",
         "errorHash":null,
         "errorDetails":null
	}
    }
}

I removed the actual shared group id for security, but I can 100% confirm the id I pass in matches the id of the group I created earlier.

So that's what I don't understand: why am I getting this error if that group *definitely* exists?

Thanks for the help!