[07:43:21 ERROR]: Error occurred while disabling AxSmithing v1.9
java.lang.RuntimeException: NMSHandler has not been initialised! This could be due to incorrect usage, or unsupported NMS version!
        at AxSmithing-1.9-all.jar/com.artillexstudios.axsmithing.libs.axapi.nms.NMSHandlers.getNmsHandler(NMSHandlers.java:44) ~[AxSmithing-1.9-all.jar:?]
        at AxSmithing-1.9-all.jar/com.artillexstudios.axsmithing.libs.axapi.AxPlugin.onDisable(AxPlugin.java:150) ~[AxSmithing-1.9-all.jar:?]
        at org.bukkit.plugin.java.JavaPlugin.setEnabled(JavaPlugin.java:291) ~[paper-mojangapi-1.21.1-R0.1-SNAPSHOT.jar:?]
        at io.papermc.paper.plugin.manager.PaperPluginInstanceManager.disablePlugin(PaperPluginInstanceManager.java:237) ~[leaf-1.21.1.jar:1.21.1-DEV-890793b]
        at io.papermc.paper.plugin.manager.PaperPluginInstanceManager.disablePlugins(PaperPluginInstanceManager.java:161) ~[leaf-1.21.1.jar:1.21.1-DEV-890793b]
        at io.papermc.paper.plugin.manager.PaperPluginManagerImpl.disablePlugins(PaperPluginManagerImpl.java:97) ~[leaf-1.21.1.jar:1.21.1-DEV-890793b]
        at org.bukkit.plugin.SimplePluginManager.disablePlugins(SimplePluginManager.java:540) ~[paper-mojangapi-1.21.1-R0.1-SNAPSHOT.jar:?]
        at org.bukkit.craftbukkit.CraftServer.disablePlugins(CraftServer.java:627) ~[leaf-1.21.1.jar:1.21.1-DEV-890793b]
        at net.minecraft.server.MinecraftServer.stopServer(MinecraftServer.java:1039) ~[leaf-1.21.1.jar:1.21.1-DEV-890793b]
        at net.minecraft.server.dedicated.DedicatedServer.stopServer(DedicatedServer.java:879) ~[leaf-1.21.1.jar:1.21.1-DEV-890793b]
        at net.minecraft.server.MinecraftServer.runServer(MinecraftServer.java:1378) ~[leaf-1.21.1.jar:1.21.1-DEV-890793b]
        at net.minecraft.server.MinecraftServer.lambda$spin$0(MinecraftServer.java:319) ~[leaf-1.21.1.jar:1.21.1-DEV-890793b]
        at java.base/java.lang.Thread.run(Thread.java:1583) ~[?:?]