[19:06:45 ERROR]: Could not load 'plugins\QuantumRPG 1.13.jar' in folder 'plugins'
org.bukkit.plugin.InvalidPluginException: java.lang.NoClassDefFoundError: su/jupiter44/jcore/JPlugin
        at org.bukkit.plugin.java.JavaPluginLoader.loadPlugin(JavaPluginLoader.java:139) ~[spigot-1.13.2.jar:git-Spigot-1a3504a-dfa7583]
        at org.bukkit.plugin.SimplePluginManager.loadPlugin(SimplePluginManager.java:332) ~[spigot-1.13.2.jar:git-Spigot-1a3504a-dfa7583]
        at org.bukkit.plugin.SimplePluginManager.loadPlugins(SimplePluginManager.java:252) [spigot-1.13.2.jar:git-Spigot-1a3504a-dfa7583]
        at org.bukkit.craftbukkit.v1_13_R2.CraftServer.loadPlugins(CraftServer.java:325) [spigot-1.13.2.jar:git-Spigot-1a3504a-dfa7583]
        at net.minecraft.server.v1_13_R2.DedicatedServer.init(DedicatedServer.java:213) [spigot-1.13.2.jar:git-Spigot-1a3504a-dfa7583]
        at net.minecraft.server.v1_13_R2.MinecraftServer.run(MinecraftServer.java:698) [spigot-1.13.2.jar:git-Spigot-1a3504a-dfa7583]
        at java.lang.Thread.run(Unknown Source) [?:1.8.0_211]
Caused by: java.lang.NoClassDefFoundError: su/jupiter44/jcore/JPlugin
        at java.lang.ClassLoader.defineClass1(Native Method) ~[?:1.8.0_211]
        at java.lang.ClassLoader.defineClass(Unknown Source) ~[?:1.8.0_211]
        at java.security.SecureClassLoader.defineClass(Unknown Source) ~[?:1.8.0_211]
        at org.bukkit.plugin.java.PluginClassLoader.findClass(PluginClassLoader.java:132) ~[spigot-1.13.2.jar:git-Spigot-1a3504a-dfa7583]
        at org.bukkit.plugin.java.PluginClassLoader.findClass(PluginClassLoader.java:82) ~[spigot-1.13.2.jar:git-Spigot-1a3504a-dfa7583]
        at java.lang.ClassLoader.loadClass(Unknown Source) ~[?:1.8.0_211]
        at java.lang.ClassLoader.loadClass(Unknown Source) ~[?:1.8.0_211]
        at java.lang.Class.forName0(Native Method) ~[?:1.8.0_211]
        at java.lang.Class.forName(Unknown Source) ~[?:1.8.0_211]
        at org.bukkit.plugin.java.PluginClassLoader.<init>(PluginClassLoader.java:60) ~[spigot-1.13.2.jar:git-Spigot-1a3504a-dfa7583]
        at org.bukkit.plugin.java.JavaPluginLoader.loadPlugin(JavaPluginLoader.java:135) ~[spigot-1.13.2.jar:git-Spigot-1a3504a-dfa7583]
        ... 6 more
Caused by: java.lang.ClassNotFoundException: su.jupiter44.jcore.JPlugin
        at java.net.URLClassLoader.findClass(Unknown Source) ~[?:1.8.0_211]
        at org.bukkit.plugin.java.PluginClassLoader.findClass(PluginClassLoader.java:136) ~[spigot-1.13.2.jar:git-Spigot-1a3504a-dfa7583]
        at org.bukkit.plugin.java.PluginClassLoader.findClass(PluginClassLoader.java:82) ~[spigot-1.13.2.jar:git-Spigot-1a3504a-dfa7583]
        at java.lang.ClassLoader.loadClass(Unknown Source) ~[?:1.8.0_211]
        at java.lang.ClassLoader.loadClass(Unknown Source) ~[?:1.8.0_211]
        at java.lang.ClassLoader.defineClass1(Native Method) ~[?:1.8.0_211]
        at java.lang.ClassLoader.defineClass(Unknown Source) ~[?:1.8.0_211]
        at java.security.SecureClassLoader.defineClass(Unknown Source) ~[?:1.8.0_211]
        at org.bukkit.plugin.java.PluginClassLoader.findClass(PluginClassLoader.java:132) ~[spigot-1.13.2.jar:git-Spigot-1a3504a-dfa7583]
        at org.bukkit.plugin.java.PluginClassLoader.findClass(PluginClassLoader.java:82) ~[spigot-1.13.2.jar:git-Spigot-1a3504a-dfa7583]
        at java.lang.ClassLoader.loadClass(Unknown Source) ~[?:1.8.0_211]
        at java.lang.ClassLoader.loadClass(Unknown Source) ~[?:1.8.0_211]
        at java.lang.Class.forName0(Native Method) ~[?:1.8.0_211]
        at java.lang.Class.forName(Unknown Source) ~[?:1.8.0_211]
        at org.bukkit.plugin.java.PluginClassLoader.<init>(PluginClassLoader.java:60) ~[spigot-1.13.2.jar:git-Spigot-1a3504a-dfa7583]
        at org.bukkit.plugin.java.JavaPluginLoader.loadPlugin(JavaPluginLoader.java:135) ~[spigot-1.13.2.jar:git-Spigot-1a3504a-dfa7583]
        ... 6 more