[16:01:35 ERROR]: Error occurred while enabling Oraxen v1.163.0 (Is it up to date?)
java.lang.NoSuchMethodError: 'java.lang.String org.bukkit.Bukkit.getMinecraftVersion()'
        at io.th0rgal.oraxen.utils.VersionUtil.isSupportedVersionOrNewer(VersionUtil.java:58) ~[?:?]
        at io.th0rgal.oraxen.OraxenPlugin.onEnable(OraxenPlugin.java:94) ~[?:?]
        at org.bukkit.plugin.java.JavaPlugin.setEnabled(JavaPlugin.java:266) ~[spigot-api-1.20.1-R0.1-SNAPSHOT.jar:?]
        at org.bukkit.plugin.java.JavaPluginLoader.enablePlugin(JavaPluginLoader.java:342) ~[spigot-api-1.20.1-R0.1-SNAPSHOT.jar:?]
        at org.bukkit.plugin.SimplePluginManager.enablePlugin(SimplePluginManager.java:480) ~[spigot-api-1.20.1-R0.1-SNAPSHOT.jar:?]
        at org.bukkit.craftbukkit.v1_20_R1.CraftServer.enablePlugin(CraftServer.java:546) ~[spigot-1.20.1-R0.1-SNAPSHOT.jar:3871-Spigot-d2eba2c-3f9263b]
        at org.bukkit.craftbukkit.v1_20_R1.CraftServer.enablePlugins(CraftServer.java:460) ~[spigot-1.20.1-R0.1-SNAPSHOT.jar:3871-Spigot-d2eba2c-3f9263b]
        at net.minecraft.server.MinecraftServer.loadWorld0(MinecraftServer.java:588) ~[spigot-1.20.1-R0.1-SNAPSHOT.jar:3871-Spigot-d2eba2c-3f9263b]
        at net.minecraft.server.MinecraftServer.loadLevel(MinecraftServer.java:413) ~[spigot-1.20.1-R0.1-SNAPSHOT.jar:3871-Spigot-d2eba2c-3f9263b]
        at net.minecraft.server.dedicated.DedicatedServer.e(DedicatedServer.java:250) ~[spigot-1.20.1-R0.1-SNAPSHOT.jar:3871-Spigot-d2eba2c-3f9263b]
        at net.minecraft.server.MinecraftServer.w(MinecraftServer.java:972) ~[spigot-1.20.1-R0.1-SNAPSHOT.jar:3871-Spigot-d2eba2c-3f9263b]
        at net.minecraft.server.MinecraftServer.lambda$0(MinecraftServer.java:303) ~[spigot-1.20.1-R0.1-SNAPSHOT.jar:3871-Spigot-d2eba2c-3f9263b]
        at java.lang.Thread.run(Thread.java:833) ~[?:?]

检查插件版本、插件对应MC服务器版本、Spigot服务器版本三者是否正确

如果你购买了此插件的话，你应该前往作者的 Discord 聊天群组寻求帮助
可能是代码有点问题。

网络问题，多试几次就行了

简单看了一下，getMinecraftVersion()这个方法在SpigotAPI中不存在，只存在于PaperAPI中，因此你要使用Paper或者其下游分支才能使用。

估计是不支持高版本了，想要高版本的话还是弄ItemsAdder好