Hotfix DiscordRanks

src/de/steamwar/bungeecore/bot/util/DiscordRanks.java

@@ -60,7 +60,7 @@ public class DiscordRanks {
             guild.removeRoleFromMember(member, role).complete();
         }
 
-        if (!needed.isEmpty()) {
+        if (needed != null && !needed.isEmpty()) {
             guild.addRoleToMember(member, guild.getRoleById(needed)).complete();
         }
     }