Untitled Composition 1

[23:09:23 INFO]: Set PluginClassLoader as parallel capable
[23:09:23 ERROR]: Could not load 'plugins/HackedServer.jar' in folder 'plugins'
org.bukkit.plugin.InvalidPluginException: Cannot find main class `io.th0rgal.hackedserver.Core'
        at org.bukkit.plugin.java.PluginClassLoader.<init>(PluginClassLoader.java:67) ~[patched.jar:git-PaperSpigot-"4c7641d"]
        at org.bukkit.plugin.java.JavaPluginLoader.loadPlugin(JavaPluginLoader.java:129) ~[patched.jar:git-PaperSpigot-"4c7641d"]
        at org.bukkit.plugin.SimplePluginManager.loadPlugin(SimplePluginManager.java:331) ~[patched.jar:git-PaperSpigot-"4c7641d"]
        at org.bukkit.plugin.SimplePluginManager.loadPlugins(SimplePluginManager.java:254) [patched.jar:git-PaperSpigot-"4c7641d"]
        at org.bukkit.craftbukkit.v1_8_R3.CraftServer.loadPlugins(CraftServer.java:293) [patched.jar:git-PaperSpigot-"4c7641d"]
        at net.minecraft.server.v1_8_R3.DedicatedServer.init(DedicatedServer.java:202) [patched.jar:git-PaperSpigot-"4c7641d"]
        at net.minecraft.server.v1_8_R3.MinecraftServer.run(MinecraftServer.java:563) [patched.jar:git-PaperSpigot-"4c7641d"]
        at java.lang.Thread.run(Thread.java:748) [?:1.8.0_201]
Caused by: java.lang.ClassNotFoundException: io.th0rgal.hackedserver.Core
        at java.net.URLClassLoader.findClass(URLClassLoader.java:382) ~[?:1.8.0_201]
        at org.bukkit.plugin.java.PluginClassLoader.findClass(PluginClassLoader.java:102) ~[patched.jar:git-PaperSpigot-"4c7641d"]
        at org.bukkit.plugin.java.PluginClassLoader.findClass(PluginClassLoader.java:87) ~[patched.jar:git-PaperSpigot-"4c7641d"]
        at java.lang.ClassLoader.loadClass(ClassLoader.java:424) ~[?:1.8.0_201]
        at java.lang.ClassLoader.loadClass(ClassLoader.java:357) ~[?:1.8.0_201]
        at java.lang.Class.forName0(Native Method) ~[?:1.8.0_201]
        at java.lang.Class.forName(Class.java:348) ~[?:1.8.0_201]
        at org.bukkit.plugin.java.PluginClassLoader.<init>(PluginClassLoader.java:65) ~[patched.jar:git-PaperSpigot-"4c7641d"]
        ... 7 more
[23:09:23 INFO]: [HackedCore] Loading HackedCore v2.71.4