[ModernPluginLoadingStrategy] Could not load plugin 'YgdPlugin-5.0-SNAPSHOT-dev.jar' in folder 'plugins'
org.bukkit.plugin.InvalidPluginException: java.lang.ExceptionInInitializerError
        at io.papermc.paper.plugin.provider.type.spigot.SpigotPluginProvider.createInstance(SpigotPluginProvider.java:127) ~[paper-1.20.1.jar:git-Paper-196]
        at io.papermc.paper.plugin.provider.type.spigot.SpigotPluginProvider.createInstance(SpigotPluginProvider.java:35) ~[paper-1.20.1.jar:git-Paper-196]
        at io.papermc.paper.plugin.entrypoint.strategy.modern.ModernPluginLoadingStrategy.loadProviders(ModernPluginLoadingStrategy.java:116) ~[paper-1.20.1.jar:git-Paper-196]
        at io.papermc.paper.plugin.storage.SimpleProviderStorage.enter(SimpleProviderStorage.java:39) ~[paper-1.20.1.jar:git-Paper-196]
        at io.papermc.paper.plugin.entrypoint.LaunchEntryPointHandler.enter(LaunchEntryPointHandler.java:36) ~[paper-1.20.1.jar:git-Paper-196]
        at org.bukkit.craftbukkit.v1_20_R1.CraftServer.loadPlugins(CraftServer.java:510) ~[paper-1.20.1.jar:git-Paper-196]
        at org.bukkit.craftbukkit.v1_20_R1.CraftServer.reload(CraftServer.java:1095) ~[paper-1.20.1.jar:git-Paper-196]
        at org.bukkit.Bukkit.reload(Bukkit.java:993) ~[paper-api-1.20.1-R0.1-SNAPSHOT.jar:?]
        at org.bukkit.command.defaults.ReloadCommand.execute(ReloadCommand.java:54) ~[paper-api-1.20.1-R0.1-SNAPSHOT.jar:?]
        at org.bukkit.command.SimpleCommandMap.dispatch(SimpleCommandMap.java:155) ~[paper-api-1.20.1-R0.1-SNAPSHOT.jar:?]
        at org.bukkit.craftbukkit.v1_20_R1.CraftServer.dispatchCommand(CraftServer.java:987) ~[paper-1.20.1.jar:git-Paper-196]
        at org.bukkit.craftbukkit.v1_20_R1.CraftServer.dispatchServerCommand(CraftServer.java:972) ~[paper-1.20.1.jar:git-Paper-196]
        at net.minecraft.server.dedicated.DedicatedServer.handleConsoleInputs(DedicatedServer.java:500) ~[paper-1.20.1.jar:git-Paper-196]
        at net.minecraft.server.dedicated.DedicatedServer.tickChildren(DedicatedServer.java:447) ~[paper-1.20.1.jar:git-Paper-196]
        at net.minecraft.server.MinecraftServer.tickServer(MinecraftServer.java:1393) ~[paper-1.20.1.jar:git-Paper-196]
        at net.minecraft.server.MinecraftServer.runServer(MinecraftServer.java:1170) ~[paper-1.20.1.jar:git-Paper-196]
        at net.minecraft.server.MinecraftServer.lambda$spin$0(MinecraftServer.java:317) ~[paper-1.20.1.jar:git-Paper-196]
        at java.lang.Thread.run(Thread.java:833) ~[?:?]
Caused by: java.lang.ExceptionInInitializerError
        at java.lang.Class.forName0(Native Method) ~[?:?]
        at java.lang.Class.forName(Class.java:488) ~[?:?]
        at java.lang.Class.forName(Class.java:467) ~[?:?]
        at org.bukkit.plugin.java.PluginClassLoader.<init>(PluginClassLoader.java:76) ~[paper-api-1.20.1-R0.1-SNAPSHOT.jar:?]
        at io.papermc.paper.plugin.provider.type.spigot.SpigotPluginProvider.createInstance(SpigotPluginProvider.java:123) ~[paper-1.20.1.jar:git-Paper-196]
        ... 17 more
Caused by: java.lang.IllegalStateException: Cannot get plugin for class org.raming.ygdplugin.YgdPlugin from a static initializer
        at org.bukkit.plugin.java.JavaPlugin.getPlugin(JavaPlugin.java:429) ~[paper-api-1.20.1-R0.1-SNAPSHOT.jar:?]
        at org.raming.ygdplugin.Func.ItemManager.<init>(ItemManager.java:18) ~[YgdPlugin-5.0-SNAPSHOT-dev.jar:?]
        at org.raming.ygdplugin.YgdPlugin.<clinit>(YgdPlugin.java:30) ~[YgdPlugin-5.0-SNAPSHOT-dev.jar:?]
        at java.lang.Class.forName0(Native Method) ~[?:?]
        at java.lang.Class.forName(Class.java:488) ~[?:?]
        at java.lang.Class.forName(Class.java:467) ~[?:?]
        at org.bukkit.plugin.java.PluginClassLoader.<init>(PluginClassLoader.java:76) ~[paper-api-1.20.1-R0.1-SNAPSHOT.jar:?]
        at io.papermc.paper.plugin.provider.type.spigot.SpigotPluginProvider.createInstance(SpigotPluginProvider.java:123) ~[paper-1.20.1.jar:git-Paper-196]
        ... 17 more

저번에 한 번 해결했었는데 다시 생겼습니다.. 이유가 뭘까요..?