Facebook Friend Pictures Returning Blank on Leaderboard

I'm using Unity 2017.1.03f with Facebook SDK 7.10.

When I make the call for a player's friends list from the the API, everything else returns fine. I get their scores, their name and everything else I need...except the picture.

The picture keeps returning blank, as in a white square.

Here is my code:

 using UnityEngine;
 using UnityEngine.UI;
 using Facebook.Unity;
 using Facebook.MiniJSON;
 using System.Collections;
 using System.Collections.Generic;
 using System.Linq;
 using System;

 private void ScoresCallback(IResult result) {
         RankInt = 1;
         IDictionary<string, object> data = result.ResultDictionary;
         List<object> scoreList = (List<object>) data["data"];
 
         foreach (Transform child in ScrollScoreList.transform) {
             GameObject.Destroy(child.gameObject);
         }
 
         foreach(object obj in scoreList) {
             var entry = (Dictionary<string, object>) obj;
             var user = (Dictionary<string , object>) entry ["user"];
 
 //            Debug.Log(user["name"].ToString() + " , " + entry["score"].ToString());
 
             GameObject scorePanel;
             scorePanel = Instantiate (ScoreEntryPanel) as GameObject;
             scorePanel.transform.SetParent(ScrollScoreList.transform, false);
 
             Transform FName = scorePanel.transform.Find ("FriendName");
             Transform FScore = scorePanel.transform.Find ("FriendScore");
             Transform FAvatar = scorePanel.transform.Find ("FriendAvatar");
             Transform FRank = scorePanel.transform.Find ("RankNumber");
 
             Text FnameText = FName.GetComponent<Text> ();
             Text FscoreText = FScore.GetComponent<Text> ();
             Text FrankText = FRank.GetComponent<Text>();
             Image FUserAvatar = FAvatar.GetComponent<Image> ();
 
             FnameText.text = user["name"].ToString();
             FscoreText.text = entry["score"].ToString();
             FrankText.text = "" + RankInt;
             RankInt += 1;
 
             FB.API (user["id"].ToString() + "/picture?width=128&height=128", HttpMethod.GET, delegate (IGraphResult picresult) {
                 FUserAvatar.sprite = Sprite.Create(picresult.Texture, new Rect(0,0,50,50), new Vector2 (0,0), 100);
                 if (picresult.Error != null) {
                     Debug.Log("Picture Error" + picresult.RawResult);
                 }
             });
 
             //ScoresDebug.text = result.RawResult;
         }
 
     }

The console is returning this: "Picture Error���� UnityEngine.Debug:Log(Object) c_AnonStorey1:<>m0(IGraphResult) (at Assets/Scripts/Facebook/FBScript.cs:267) Facebook.Unity.d_9:MoveNext() UnityEngine.SetupCoroutine:InvokeMoveNext(IEnumerator, IntPtr)"

What I have tried:

1. putting "https" + "://graph.facebook.com/" in front of user["id"].ToString()

2. "/picture?width=128&height=128&redirect=false"

3. FUserAvatar.overrideSprite