Server-side support error on paper server running 1.21.1

[21:36:35 ERROR]: [ModernPluginLoadingStrategy] Could not load plugin 'DHS-0.8.0_for_MC-1.21.1.jar' in folder 'plugins/.paper-remapped'
org.bukkit.plugin.InvalidPluginException: Unsupported API version 1.21.1
        at org.bukkit.craftbukkit.util.CraftMagicNumbers.checkSupported(CraftMagicNumbers.java:369) ~[paper-1.21.jar:1.21-130-b1b5d4c]
        at io.papermc.paper.plugin.provider.type.spigot.SpigotPluginProvider.createInstance(SpigotPluginProvider.java:121) ~[paper-1.21.jar:1.21-130-b1b5d4c]
        at io.papermc.paper.plugin.provider.type.spigot.SpigotPluginProvider.createInstance(SpigotPluginProvider.java:35) ~[paper-1.21.jar:1.21-130-b1b5d4c]
        at io.papermc.paper.plugin.entrypoint.strategy.modern.ModernPluginLoadingStrategy.loadProviders(ModernPluginLoadingStrategy.java:116) ~[paper-1.21.jar:1.21-130-b1b5d4c]
        at io.papermc.paper.plugin.storage.SimpleProviderStorage.enter(SimpleProviderStorage.java:38) ~[paper-1.21.jar:1.21-130-b1b5d4c]
        at io.papermc.paper.plugin.entrypoint.LaunchEntryPointHandler.enter(LaunchEntryPointHandler.java:40) ~[paper-1.21.jar:1.21-130-b1b5d4c]
        at org.bukkit.craftbukkit.CraftServer.loadPlugins(CraftServer.java:546) ~[paper-1.21.jar:1.21-130-b1b5d4c]
        at net.minecraft.server.dedicated.DedicatedServer.initServer(DedicatedServer.java:292) ~[paper-1.21.jar:1.21-130-b1b5d4c]
        at net.minecraft.server.MinecraftServer.runServer(MinecraftServer.java:1215) ~[paper-1.21.jar:1.21-130-b1b5d4c]
        at net.minecraft.server.MinecraftServer.lambda$spin$0(MinecraftServer.java:330) ~[paper-1.21.jar:1.21-130-b1b5d4c]
        at java.base/java.lang.Thread.run(Thread.java:1583) ~[?:?]