update Scoreboard

Hello, I have a problem that I can't deal with and I ask for help, I do tabliste under 1.8 and everything works, it only generates a mistake that I can't handle ...

Code:

[15:50:20 WARN]: [eCORE] Task #28 for eCORE v1.2-SNAPSHOT generated an exception
java.lang.NullPointerException
        at com.gmail.neex.tab.element.Sidebar.globalUpdate(Sidebar.java:223) ~[?:?]
        at com.gmail.neex.tab.element.ScoreboardStack.run(ScoreboardStack.java:31) ~[?:?]
        at org.bukkit.craftbukkit.v1_8_R3.scheduler.CraftTask.run(CraftTask.java:71) ~[spigot.jar:git-Spigot-db6de12-18fbb24]
        at org.bukkit.craftbukkit.v1_8_R3.scheduler.CraftScheduler.mainThreadHeartbeat(CraftScheduler.java:350) [spigot.jar:git-Spigot-db6de12-18fbb24]
        at net.minecraft.server.v1_8_R3.MinecraftServer.B(MinecraftServer.java:723) [spigot.jar:git-Spigot-db6de12-18fbb24]
        at net.minecraft.server.v1_8_R3.DedicatedServer.B(DedicatedServer.java:374) [spigot.jar:git-Spigot-db6de12-18fbb24]
        at net.minecraft.server.v1_8_R3.MinecraftServer.A(MinecraftServer.java:654) [spigot.jar:git-Spigot-db6de12-18fbb24]
        at net.minecraft.server.v1_8_R3.MinecraftServer.run(MinecraftServer.java:557) [spigot.jar:git-Spigot-db6de12-18fbb24]
        at java.lang.Thread.run(Unknown Source) [?:1.8.0_231]

Sidebar

Code:

    public void update() {
        final Scoreboard sb = this.user.getScoreboard();
        if (sb == null) {
            return;
        }
        final Objective ob = sb.getObjective("SIDEBAR");
        if (!SettingsConfig.SIDEBAR_ENABLE || this.disabled) {
            if (ob != null) {
                ob.unregister();
            }
            return;
        }
        if (ob == null) {
            this.create();
        }
        this.replace();
        this.split();
        final String[] scheme = Scheme.getInst().getSchemeSidebar();
        for (int i = 0; i < this.ss.length; ++i) {
            Team team = sb.getTeam(scheme[i]);
            if (team == null) {
                team = sb.registerNewTeam(scheme[i]);
                team.addPlayer((OfflinePlayer)new OfflineUser(scheme[i]));
            }
            team.setPrefix((this.prefix[i] == null) ? "" : this.prefix[i]);
            team.setSuffix((this.suffix[i] == null) ? "" : this.suffix[i]);
        }
    }

    public static void globalUpdate() {
        for (final User user : UserManager.getOnline()) {
            user.getSidebar().update();
            user.setScoreboard(user.getScoreboard());
            user.getScoreboard();
            user.getPlayer().getScoreboard();
            user.getPlayer().setScoreboard(user.getPlayer().getScoreboard());
            user.getPlayer().setScoreboard(user.getScoreboard());
            user.getSidebar();
            user.getSidebar().update();

ScoreboardStack

Code:

    public void run() {
        this.fill();
        Sidebar.globalUpdate();
    }