SpigotVIP PlotSquared v5 6.0.8

Why this isn't the premium ressource ?

When writing any command it gives me an error in chat: "An internal error occurred while attempting to tab-complete this command"

And one more in the console: "[22:17:39 ERROR]: Exception when TrollGamer_Proo attempted to tab complete ps
org.bukkit.command.CommandException: Unhandled exception during tab completion for command '/ ps' in PlotSquared plugin v5.13.7-Premium
at org.bukkit.command.PluginCommand.tabComplete (PluginCommand.java:150) ~ [patched_1.16.3.jar: git-Paper-246]
at org.bukkit.command.Command.tabComplete (Command.java:93) ~ [patched_1.16.3.jar: git-Paper-246]
at org.bukkit.command.SimpleCommandMap.tabComplete (SimpleCommandMap.java:244) ~ [patched_1.16.3.jar: git-Paper-246]
at org.bukkit.craftbukkit.v1_16_R2.CraftServer.tabCompleteCommand (CraftServer.java:1883) ~ [patched_1.16.3.jar: git-Paper-246]
at org.bukkit.craftbukkit.v1_16_R2.CraftServer.tabComplete (CraftServer.java:1855) ~ [patched_1.16.3.jar: git-Paper-246]
at org.bukkit.craftbukkit.v1_16_R2.command.BukkitCommandWrapper.getSuggestions (BukkitCommandWrapper.java:58) ~ [patched_1.16.3.jar: git-Paper-246]
at com.mojang.brigadier.tree.ArgumentCommandNode.listSuggestions (ArgumentCommandNode.java:71) ~ [patched_1.16.3.jar: git-Paper-246]
at com.mojang.brigadier.CommandDispatcher.getCompletionSuggestions (CommandDispatcher.java:596) ~ [patched_1.16.3.jar: git-Paper-246]
at com.mojang.brigadier.CommandDispatcher.getCompletionSuggestions (CommandDispatcher.java:579) ~ [patched_1.16.3.jar: git-Paper-246]
at net.minecraft.server.v1_16_R2.PlayerConnection.lambda $ a $ 4 (PlayerConnection.java:589) ~ [patched_1.16.3.jar: git-Paper-246]
at net.minecraft.server.v1_16_R2.TickTask.run (SourceFile: 18) ~ [patched_1.16.3.jar: git-Paper-246]
at net.minecraft.server.v1_16_R2.IAsyncTaskHandler.executeTask (IAsyncTaskHandler.java:136) ~ [patched_1.16.3.jar: git-Paper-246]
at net.minecraft.server.v1_16_R2.IAsyncTaskHandlerReentrant.executeTask (SourceFile: 23) ~ [patched_1.16.3.jar: git-Paper-246]
at net.minecraft.server.v1_16_R2.IAsyncTaskHandler.executeNext (IAsyncTaskHandler.java:109) ~ [patched_1.16.3.jar: git-Paper-246]
at net.minecraft.server.v1_16_R2.MinecraftServer.ba (MinecraftServer.java:1135) ~ [patched_1.16.3.jar: git-Paper-246]
at net.minecraft.server.v1_16_R2.MinecraftServer.executeNext (MinecraftServer.java:1128) ~ [patched_1.16.3.jar: git-Paper-246]
at net.minecraft.server.v1_16_R2.IAsyncTaskHandler.awaitTasks (IAsyncTaskHandler.java:119) ~ [patched_1.16.3.jar: git-Paper-246]
at net.minecraft.server.v1_16_R2.MinecraftServer.a (MinecraftServer.java:1202) ~ [patched_1.16.3.jar: git-Paper-246]
at net.minecraft.server.v1_16_R2.MinecraftServer.w (MinecraftServer.java:999) ~ [patched_1.16.3.jar: git-Paper-246]
at net.minecraft.server.v1_16_R2.MinecraftServer.lambda $ a $ 0 (MinecraftServer.java:177) ~ [patched_1.16.3.jar: git-Paper-246]
at java.lang.Thread.run (Thread.java:748) [?: 1.8.0_275]
Caused by: java.lang.IllegalStateException: zip file closed
at java.util.zip.ZipFile.ensureOpen (ZipFile.java:686) ~ [?: 1.8.0_275]
at java.util.zip.ZipFile.getEntry (ZipFile.java:315) ~ [?: 1.8.0_275]
at java.util.jar.JarFile.getEntry (JarFile.java:240) ~ [?: 1.8.0_275]
at java.util.jar.JarFile.getJarEntry (JarFile.java:223) ~ [?: 1.8.0_275]
at org.bukkit.plugin.java.PluginClassLoader.findClass (PluginClassLoader.java:133) ~ [patched_1.16.3.jar: git-Paper-246]
at org.bukkit.plugin.java.JavaPluginLoader.getClassByName (JavaPluginLoader.java:216) ~ [patched_1.16.3.jar: git-Paper-246]
at org.bukkit.plugin.java.PluginClassLoader.findClass (PluginClassLoader.java:111) ~ [patched_1.16.3.jar: git-Paper-246]
at org.bukkit.plugin.java.PluginClassLoader.findClass (PluginClassLoader.java:100) ~ [patched_1.16.3.jar: git-Paper-246]
at java.lang.ClassLoader.loadClass (ClassLoader.java:418) ~ [?: 1.8.0_275]
at java.lang.ClassLoader.loadClass (ClassLoader.java:351) ~ [?: 1.8.0_275]
at com.plotsquared.core.command.Command.canExecute (Command.java:454) ~ [?:?]
at com.plotsquared.core.command.Command.tab (Command.java:534) ~ [?:?]
at com.plotsquared.bukkit.BukkitCommand.onTabComplete (BukkitCommand.java:73) ~ [?:?]
at org.bukkit.command.PluginCommand.tabComplete (PluginCommand.java:138) ~ [patched_1.16.3.jar: git-Paper-246] "

I would appreciate your help!