Error with 3.4 on fh1 on shutdown

[JustBru00]

[12:50:06 ERROR]: Error occurred while disabling TimingSystem v3.4
java.lang.NullPointerException: null
at java.base/java.util.Objects.requireNonNull(Objects.java:233) ~[?:?]
at TimingSystem-3.4.jar/net.megavex.scoreboardlibrary.implementation.sidebar.AbstractSidebar.tick(AbstractSidebar.java:213) ~[TimingSystem-3.4.jar:?]
at TimingSystem-3.4.jar/net.megavex.scoreboardlibrary.implementation.ScoreboardLibraryImpl.close(ScoreboardLibraryImpl.java:170) ~[TimingSystem-3.4.jar:?]
at TimingSystem-3.4.jar/me.makkuusen.timing.system.TimingSystem.onDisable(TimingSystem.java:229) ~[TimingSystem-3.4.jar:?]
at org.bukkit.plugin.java.JavaPlugin.setEnabled(JavaPlugin.java:286) ~[paper-api-1.21.4-R0.1-SNAPSHOT.jar:?]
at io.papermc.paper.plugin.manager.PaperPluginInstanceManager.disablePlugin(PaperPluginInstanceManager.java:237) ~[paper-1.21.4.jar:1.21.4-232-12d8fe0]
at io.papermc.paper.plugin.manager.PaperPluginInstanceManager.disablePlugins(PaperPluginInstanceManager.java:161) ~[paper-1.21.4.jar:1.21.4-232-12d8fe0]
at io.papermc.paper.plugin.manager.PaperPluginManagerImpl.disablePlugins(PaperPluginManagerImpl.java:97) ~[paper-1.21.4.jar:1.21.4-232-12d8fe0]
at org.bukkit.plugin.SimplePluginManager.disablePlugins(SimplePluginManager.java:541) ~[paper-api-1.21.4-R0.1-SNAPSHOT.jar:?]
at org.bukkit.craftbukkit.CraftServer.disablePlugins(CraftServer.java:627) ~[paper-1.21.4.jar:1.21.4-232-12d8fe0]
at net.minecraft.server.MinecraftServer.stopServer(MinecraftServer.java:1007) ~[paper-1.21.4.jar:1.21.4-232-12d8fe0]
at net.minecraft.server.dedicated.DedicatedServer.stopServer(DedicatedServer.java:757) ~[paper-1.21.4.jar:1.21.4-232-12d8fe0]
at net.minecraft.server.MinecraftServer.runServer(MinecraftServer.java:1294) ~[paper-1.21.4.jar:1.21.4-232-12d8fe0]
at net.minecraft.server.MinecraftServer.lambda$spin$2(MinecraftServer.java:310) ~[paper-1.21.4.jar:1.21.4-232-12d8fe0]
at java.base/java.lang.Thread.run(Thread.java:1583) ~[?:?]