Could not load 'plugins\[O][奥拉克森]oraxen-1.118.2-all.jar' in folder 'plugins'
org.bukkit.plugin.InvalidPluginException: java.lang.UnsupportedClassVersionError: io/th0rgal/oraxen/OraxenPlugin has been compiled by a more recent version of the Java Runtime (class file version 60.0), this version of the Java Runtime only recognizes class file versions up to 52.0
        at org.bukkit.plugin.java.JavaPluginLoader.loadPlugin(JavaPluginLoader.java:139) ~[spigot-1.16.5.jar:3028-Spigot-79d53c2-7eb3564]
        at org.bukkit.plugin.SimplePluginManager.loadPlugin(SimplePluginManager.java:394) ~[spigot-1.16.5.jar:3028-Spigot-79d53c2-7eb3564]
        at org.bukkit.plugin.SimplePluginManager.loadPlugins(SimplePluginManager.java:301) ~[spigot-1.16.5.jar:3028-Spigot-79d53c2-7eb3564]
        at org.bukkit.craftbukkit.v1_16_R3.CraftServer.loadPlugins(CraftServer.java:382) ~[spigot-1.16.5.jar:3028-Spigot-79d53c2-7eb3564]
        at net.minecraft.server.v1_16_R3.DedicatedServer.init(DedicatedServer.java:224) ~[spigot-1.16.5.jar:3028-Spigot-79d53c2-7eb3564]
        at net.minecraft.server.v1_16_R3.MinecraftServer.w(MinecraftServer.java:918) ~[spigot-1.16.5.jar:3028-Spigot-79d53c2-7eb3564]
        at net.minecraft.server.v1_16_R3.MinecraftServer.lambda$0(MinecraftServer.java:273) ~[spigot-1.16.5.jar:3028-Spigot-79d53c2-7eb3564]
        at java.lang.Thread.run(Unknown Source) [?:1.8.0_144]
Caused by: java.lang.UnsupportedClassVersionError: io/th0rgal/oraxen/OraxenPlugin has been compiled by a more recent version of the Java Runtime (class file version 60.0), this version of the Java Runtime only recognizes class file versions up to 52.0
        at java.lang.ClassLoader.defineClass1(Native Method) ~[?:1.8.0_144]
        at java.lang.ClassLoader.defineClass(Unknown Source) ~[?:1.8.0_144]
        at java.security.SecureClassLoader.defineClass(Unknown Source) ~[?:1.8.0_144]
        at org.bukkit.plugin.java.PluginClassLoader.findClass(PluginClassLoader.java:163) ~[spigot-1.16.5.jar:3028-Spigot-79d53c2-7eb3564]
        at org.bukkit.plugin.java.PluginClassLoader.findClass(PluginClassLoader.java:96) ~[spigot-1.16.5.jar:3028-Spigot-79d53c2-7eb3564]
        at java.lang.ClassLoader.loadClass(Unknown Source) ~[?:1.8.0_144]
        at java.lang.ClassLoader.loadClass(Unknown Source) ~[?:1.8.0_144]
        at java.lang.Class.forName0(Native Method) ~[?:1.8.0_144]
        at java.lang.Class.forName(Unknown Source) ~[?:1.8.0_144]
        at org.bukkit.plugin.java.PluginClassLoader.<init>(PluginClassLoader.java:64) ~[spigot-1.16.5.jar:3028-Spigot-79d53c2-7eb3564]
        at org.bukkit.plugin.java.JavaPluginLoader.loadPlugin(JavaPluginLoader.java:135) ~[spigot-1.16.5.jar:3028-Spigot-79d53c2-7eb3564]
        ... 7 more

有些插件不支持热加载 请尝试重启服务器来加载插件

已自行解决，java换成16就可以了