Confirmation

• I have read the FAQ.
• I have tested the latest development build of Holographic Displays and the bug is still present.
• I have updated Spigot to the latest release for my particular Minecraft version.
• I made sure the bug hasn't already been reported on the issue tracker.

Description

So I use the latest development build released on Mar 12. It does not work. First off in the console in says:
[HolographicDisplays] Enabling HolographicDisplays v2.4.9
[21:28:18 INFO]:
[21:28:18 INFO]:
[21:28:18 INFO]: ****************************************************************************
[21:28:18 INFO]: Holographic Displays does not support this server version.
[21:28:18 INFO]: Supported Spigot versions: from 1.8.3 to 1.16.4.
[21:28:18 INFO]:
[21:28:18 INFO]: This plugin has been disabled.
[21:28:18 INFO]: ****************************************************************************

Then under that there is error with update:

[HolographicDisplays] Unable to check for updates: unhandled exception.
org.bukkit.plugin.IllegalPluginAccessException: Plugin attempted to register task while disabled
at org.bukkit.craftbukkit.v1_18_R2.scheduler.CraftScheduler.validate(CraftScheduler.java:552) ~[purpur-1.18.2.jar:git-Purpur-1611]
at org.bukkit.craftbukkit.v1_18_R2.scheduler.CraftScheduler.runTaskTimer(CraftScheduler.java:227) ~[purpur-1.18.2.jar:git-Purpur-1611]
at org.bukkit.craftbukkit.v1_18_R2.scheduler.CraftScheduler.runTaskTimer(CraftScheduler.java:212) ~[purpur-1.18.2.jar:git-Purpur-1611]
at org.bukkit.craftbukkit.v1_18_R2.scheduler.CraftScheduler.runTaskLater(CraftScheduler.java:176) ~[purpur-1.18.2.jar:git-Purpur-1611]
at org.bukkit.craftbukkit.v1_18_R2.scheduler.CraftScheduler.runTask(CraftScheduler.java:145) ~[purpur-1.18.2.jar:git-Purpur-1611]
at com.gmail.filoghost.holographicdisplays.updater.UpdateChecker.lambda$run$1(UpdateChecker.java:63) ~[HolographicDisplays.jar:?]
at org.bukkit.craftbukkit.v1_18_R2.scheduler.CraftTask.run(CraftTask.java:101) ~[purpur-1.18.2.jar:git-Purpur-1611]
at org.bukkit.craftbukkit.v1_18_R2.scheduler.CraftAsyncTask.run(CraftAsyncTask.java:57) ~[purpur-1.18.2.jar:git-Purpur-1611]
at com.destroystokyo.paper.ServerSchedulerReportingWrapper.run(ServerSchedulerReportingWrapper.java:22) ~[purpur-1.18.2.jar:git-Purpur-1611]
at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1136) ~[?:?]
at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:635) ~[?:?]
at java.lang.Thread.run(Thread.java:833) ~[?:?]

And when I try to execute "hd" command, it does not work and error occurs:

[21:32:49 WARN]: Unexpected exception while parsing console command "hd"
org.bukkit.command.CommandException: Cannot execute command 'hd' in plugin HolographicDisplays v2.4.9 - plugin is disabled.
at org.bukkit.command.PluginCommand.execute(PluginCommand.java:37) ~[purpur-api-1.18.2-R0.1-SNAPSHOT.jar:?]
at org.bukkit.command.SimpleCommandMap.dispatch(SimpleCommandMap.java:172) ~[purpur-api-1.18.2-R0.1-SNAPSHOT.jar:?]
at org.bukkit.craftbukkit.v1_18_R2.CraftServer.dispatchCommand(CraftServer.java:906) ~[purpur-1.18.2.jar:git-Purpur-1611]
at org.bukkit.craftbukkit.v1_18_R2.CraftServer.dispatchServerCommand(CraftServer.java:869) ~[purpur-1.18.2.jar:git-Purpur-1611]
at net.minecraft.server.dedicated.DedicatedServer.handleConsoleInputs(DedicatedServer.java:549) ~[purpur-1.18.2.jar:git-Purpur-1611]
at net.minecraft.server.dedicated.DedicatedServer.tickChildren(DedicatedServer.java:523) ~[purpur-1.18.2.jar:git-Purpur-1611]
at net.minecraft.server.MinecraftServer.tickServer(MinecraftServer.java:1482) ~[purpur-1.18.2.jar:git-Purpur-1611]
at net.minecraft.server.MinecraftServer.runServer(MinecraftServer.java:1246) ~[purpur-1.18.2.jar:git-Purpur-1611]
at net.minecraft.server.MinecraftServer.lambda$spin$1(MinecraftServer.java:320) ~[purpur-1.18.2.jar:git-Purpur-1611]
at java.lang.Thread.run(Thread.java:833) ~[?:?]

How to reproduce

IDK

Server version

Current: git-Purpur-1611 (MC: 1.18.2)* (Purpur is fork of PaperSpigot, which is fork of Spigot)

Holographic Displays version

Does not work

Installed plugins that allow players to join with multiple Minecraft versions

none

Additional information

No response

The plugin version is mentioned multiple times in your logs:

[HolographicDisplays] Enabling HolographicDisplays v2.4.9
Cannot execute command 'hd' in plugin HolographicDisplays v2.4.9 - plugin is disabled.

You're definitely not using 3.0.0. Double check your plugins folder.

You should realy update to 'latest'...
v2.4.9 is from 2021!
You need to update to V3.0.0 Snapshot

As they said, you probably have multiple versions in the plugins folder, or loaded externally somehow. What is happening is not the plugin's fault.