Compatibility issues with paper 1.21.1

[Kruseified]

[17:35:46 ERROR]: [AxEnvoy] Error initializing plugin 'AxEnvoy-2.0.4.jar' in folder 'plugins/.paper-remapped' (Is it up to date?)
java.lang.RuntimeException: NMSHandler has not been initialised! This could be due to incorrect usage, or unsupported NMS version!
at AxEnvoy-2.0.4.jar/com.artillexstudios.axenvoy.libs.axapi.nms.NMSHandlers.getNmsHandler(NMSHandlers.java:26) ~[AxEnvoy-2.0.4.jar:?]
at AxEnvoy-2.0.4.jar/com.artillexstudios.axenvoy.libs.axapi.AxPlugin.onLoad(AxPlugin.java:141) ~[AxEnvoy-2.0.4.jar:?]
at io.papermc.paper.plugin.storage.ServerPluginProviderStorage.processProvided(ServerPluginProviderStorage.java:59) ~[universe-1.21.1.jar:1.21.1-077c3a9]
at io.papermc.paper.plugin.storage.ServerPluginProviderStorage.processProvided(ServerPluginProviderStorage.java:18) ~[universe-1.21.1.jar:1.21.1-077c3a9]
at io.papermc.paper.plugin.storage.SimpleProviderStorage.enter(SimpleProviderStorage.java:39) ~[universe-1.21.1.jar:1.21.1-077c3a9]
at io.papermc.paper.plugin.entrypoint.LaunchEntryPointHandler.enter(LaunchEntryPointHandler.java:40) ~[universe-1.21.1.jar:1.21.1-077c3a9]
at org.bukkit.craftbukkit.CraftServer.loadPlugins(CraftServer.java:552) ~[universe-1.21.1.jar:1.21.1-077c3a9]
at net.minecraft.server.dedicated.DedicatedServer.initServer(DedicatedServer.java:304) ~[universe-1.21.1.jar:1.21.1-077c3a9]
at net.minecraft.server.MinecraftServer.runServer(MinecraftServer.java:1221) ~[universe-1.21.1.jar:1.21.1-077c3a9]
at net.minecraft.server.MinecraftServer.lambda$spin$0(MinecraftServer.java:334) ~[universe-1.21.1.jar:1.21.1-077c3a9]
at java.base/java.lang.Thread.run(Thread.java:1583) ~[?:?]