src/de/steamwar/bungeecore/commands/TeamCommand.java

@@ -31,6 +31,7 @@ import net.md_5.bungee.UserConnection;
 import net.md_5.bungee.api.ChatColor;
 import net.md_5.bungee.api.CommandSender;
 import net.md_5.bungee.api.ProxyServer;
+import net.md_5.bungee.api.ServerConnectRequest;
 import net.md_5.bungee.api.chat.ClickEvent;
 import net.md_5.bungee.api.chat.ComponentBuilder;
 import net.md_5.bungee.api.chat.HoverEvent;
@@ -595,11 +596,24 @@ public class TeamCommand extends BasicCommand {
             ProxyServer.getInstance().getServers().put(info.getName(), info);
             return info;
         });
+        player.connect(ServerConnectRequest.builder()
+                        .target(serverInfo)
+                        .connectTimeout(BungeeCord.getInstance().getConfig().getServerConnectTimeout())
+                        .retry(false)
+                        .reason(ServerConnectEvent.Reason.PLUGIN)
+                        .callback((success, error) -> {
+                            if (error != null) {
+                                Message.send("TEAM_OFFLINE", player);
+                            }
+                        })
+                .build());
+        /*
         ((UserConnection) player).connect(serverInfo, (success, error) -> {
             if (error != null) {
                 Message.send("TEAM_OFFLINE", player);
             }
         }, false, ServerConnectEvent.Reason.PLUGIN, BungeeCord.getInstance().getConfig().getServerConnectTimeout(), false);
+         */
     }
 
     private void server(ProxiedPlayer player, SteamwarUser user, Team team, String[] args){

src/de/steamwar/bungeecore/listeners/SubserverProtocolFixer.java

@@ -19,12 +19,12 @@
 
 package de.steamwar.bungeecore.listeners;
 
-import io.github.waterfallmc.waterfall.utils.UUIDUtils;
 import net.md_5.bungee.BungeeCord;
 import net.md_5.bungee.api.event.LoginEvent;
 import net.md_5.bungee.connection.InitialHandler;
 import net.md_5.bungee.connection.LoginResult;
 import net.md_5.bungee.event.EventHandler;
+import net.md_5.bungee.protocol.Property;
 import net.md_5.bungee.util.AddressUtil;
 
 import java.lang.reflect.Field;
@@ -50,11 +50,12 @@ public class SubserverProtocolFixer extends BasicListener {
     public void loginEvent(LoginEvent e) {
         InitialHandler initialHandler = ((InitialHandler) e.getConnection());
 
-        String extraData = "\00" + AddressUtil.sanitizeAddress(inetSocketAddress) + "\00" + UUIDUtils.undash(initialHandler.getUniqueId().toString());
+        String undashedUUID = initialHandler.getUniqueId().toString().replace("-", "");
+        String extraData = "\00" + AddressUtil.sanitizeAddress(inetSocketAddress) + "\00" + undashedUUID;
 
         LoginResult result = initialHandler.getLoginProfile();
         if (result != null) {
-            LoginResult.Property[] properties = result.getProperties();
+            Property[] properties = result.getProperties();
             if (properties.length > 0) {
                 extraData += "\00" + BungeeCord.getInstance().gson.toJson(properties);
             }

src/de/steamwar/bungeecore/listeners/TablistManager.java

@@ -93,7 +93,7 @@ public class TablistManager extends BasicListener {
         //Calculate server-player-map
         tablist = new TablistGroup(true, "");
         TablistGroup bau = new TablistGroup(false, "Bau");
-        for (ServerInfo server : ProxyServer.getInstance().getServersCopy().values()){
+        for (ServerInfo server : new ArrayList<>(ProxyServer.getInstance().getServers().values())){
             if(server.getPlayers().isEmpty())
                 continue;