diff --git a/Program.cs b/Program.cs
index 89088d1..8935b45 100644
--- a/Program.cs
+++ b/Program.cs
@@ -259,12 +259,15 @@ namespace chord
 								foreach (var users in roles.Members)
 								{
 									var userName = Regex.Replace(users.Username, @"[^\u0000-\u007F]+", string.Empty);
-									var userNick = Regex.Replace(users.Nickname, @"[^\u0000-\u007F]+", string.Empty);
 
-									node.Children.Add(new TreeNode($"{userNick}#{users.Discriminator} ({userNick})"));
+									string userNick = string.Empty;
+									if (users.Nickname != null)
+										userNick = Regex.Replace(users.Nickname, @"[^\u0000-\u007F]+", string.Empty);
+
+									node.Children.Add(new TreeNode($"{userName}#{users.Discriminator} ({userNick})"));
 								}
 
-								rolesDict.Add(roles.Position, node);
+								rolesDict.TryAdd(roles.Position, node);
 							}
 
 							foreach (var role in rolesDict)
@@ -276,7 +279,8 @@ namespace chord
 								rpcClient.UpdateState($"In channel {client.GetGuild(currentSelectedGuild).GetTextChannel(currentSelectedChannel).Name}");
 								rpcClient.UpdateStartTime();
 							}
-						} catch {
+						} catch(Exception err) {
+							Console.WriteLine(err);
 							await chatBoxList.SetSourceAsync(new List<string>());
 						}
 					};