Making custom scoreboard objective on player list

I started creating a custom scoreboard objective that displays the health level, ping or a customized interval on the tab. Instead, I do not want to use a scoreboard team or a simple scoreboard, because it has a problem, for example, if I give the placeholder the level of the player's experience (interval markup), but this throws IllegalArgumentException to the server console. This is inappropriate, so I would like to use the custom scoreboard object.
I've looked at each page what it should, but it did not help. Here is the code I started:

Code:

try {
    Object newPacketObj = Class.forName("net.minecraft.server." + version + ".PacketPlayOutScoreboardObjective").getConstructor().newInstance();
    Class<?> newPacketScore = Class.forName("net.minecraft.server." + version + ".PacketPlayOutScoreboardObjective");
    newPacketScore.getDeclaredField("a").setAccessible(true);
} catch (Exception e) {
  e.printStackTrace();
}

Example images what I want:

 

What's the IllegalArgumentException? Also, I do not see what you are trying to do with your code. It would be much simpler if you just wrote using the Bukkit scoreboard system, made a new objective, that assigned values to those objectives. Please, post the IllegalArgumentException

 

As I said, the Bukkit objects are not correct because not work the way they should. For example: if I set the health object with Bukkit and update it in the game then I get the result: https://hub.spigotmc.org/jira/browse/SPIGOT-3835

With the custom packets, I get the opposite of that. That is, it works normally.

This error:

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[09:08:21 WARN]: [MyPlugin] Task #54906 for MyPlugin v3.7 generated an exception
java.lang.IllegalArgumentException: Entry cannot be longer than 40 characters!
at org.bukkit.craftbukkit.v1_13_R2.scoreboard.CraftObjective.getScore(CraftObjective.java:113) ~[patched_1.13.2.jar:git-Paper-461]
at org.bukkit.craftbukkit.v1_13_R2.scheduler.CraftTask.run(CraftTask.java:82) ~[patched_1.13.2.jar:git-Paper-461]
at org.bukkit.craftbukkit.v1_13_R2.scheduler.CraftScheduler.mainThreadHeartbeat(CraftScheduler.java:448) ~[patched_1.13.2.jar:git-Paper-461]
at net.minecraft.server.v1_13_R2.MinecraftServer.b(MinecraftServer.java:1008) ~[patched_1.13.2.jar:git-Paper-461]
at net.minecraft.server.v1_13_R2.DedicatedServer.b(DedicatedServer.java:439) ~[patched_1.13.2.jar:git-Paper-461]
at net.minecraft.server.v1_13_R2.MinecraftServer.a(MinecraftServer.java:943) ~[patched_1.13.2.jar:git-Paper-461]
at net.minecraft.server.v1_13_R2.MinecraftServer.run(MinecraftServer.java:841) ~[patched_1.13.2.jar:git-Paper-461]
at java.lang.Thread.run(Unknown Source) [?:1.8.0_192]

The code is visible in the post above because it is the path of the error.