[20:25:30 ERROR]: Could not load 'plugins\VirtualPlayers-1.13.2.jar' in folder 'plugins'
org.bukkit.plugin.InvalidPluginException: java.lang.NoClassDefFoundError: mc/alk/virtualplayers/api/VirtualPlayersAPI
        at org.bukkit.plugin.java.JavaPluginLoader.loadPlugin(JavaPluginLoader.java:133) ~[spigot.jar:git-Paper-488]
        at org.bukkit.plugin.SimplePluginManager.loadPlugin(SimplePluginManager.java:329) ~[spigot.jar:git-Paper-488]
        at org.bukkit.plugin.SimplePluginManager.loadPlugins(SimplePluginManager.java:251) ~[spigot.jar:git-Paper-488]
        at org.bukkit.craftbukkit.v1_13_R2.CraftServer.loadPlugins(CraftServer.java:329) ~[spigot.jar:git-Paper-488]
        at net.minecraft.server.v1_13_R2.DedicatedServer.init(DedicatedServer.java:235) ~[spigot.jar:git-Paper-488]
        at net.minecraft.server.v1_13_R2.MinecraftServer.run(MinecraftServer.java:791) ~[spigot.jar:git-Paper-488]
        at java.lang.Thread.run(Unknown Source) [?:1.8.0_171]
Caused by: java.lang.NoClassDefFoundError: mc/alk/virtualplayers/api/VirtualPlayersAPI
        at java.lang.ClassLoader.defineClass1(Native Method) ~[?:1.8.0_171]
        at java.lang.ClassLoader.defineClass(Unknown Source) ~[?:1.8.0_171]
        at java.security.SecureClassLoader.defineClass(Unknown Source) ~[?:1.8.0_171]
        at org.bukkit.plugin.java.PluginClassLoader.findClass(PluginClassLoader.java:154) ~[spigot.jar:git-Paper-488]
        at org.bukkit.plugin.java.PluginClassLoader.findClass(PluginClassLoader.java:104) ~[spigot.jar:git-Paper-488]
        at java.lang.ClassLoader.loadClass(Unknown Source) ~[?:1.8.0_171]
        at java.lang.ClassLoader.loadClass(Unknown Source) ~[?:1.8.0_171]
        at java.lang.Class.forName0(Native Method) ~[?:1.8.0_171]
        at java.lang.Class.forName(Unknown Source) ~[?:1.8.0_171]
        at org.bukkit.plugin.java.PluginClassLoader.<init>(PluginClassLoader.java:82) ~[spigot.jar:git-Paper-488]
        at org.bukkit.plugin.java.JavaPluginLoader.loadPlugin(JavaPluginLoader.java:129) ~[spigot.jar:git-Paper-488]
        ... 6 more
Caused by: java.lang.ClassNotFoundException: mc.alk.virtualplayers.api.VirtualPlayersAPI
        at java.net.URLClassLoader.findClass(Unknown Source) ~[?:1.8.0_171]
        at org.bukkit.plugin.java.PluginClassLoader.findClass(PluginClassLoader.java:158) ~[spigot.jar:git-Paper-488]
        at org.bukkit.plugin.java.PluginClassLoader.findClass(PluginClassLoader.java:104) ~[spigot.jar:git-Paper-488]
        at java.lang.ClassLoader.loadClass(Unknown Source) ~[?:1.8.0_171]
        at java.lang.ClassLoader.loadClass(Unknown Source) ~[?:1.8.0_171]
        at java.lang.ClassLoader.defineClass1(Native Method) ~[?:1.8.0_171]
        at java.lang.ClassLoader.defineClass(Unknown Source) ~[?:1.8.0_171]
        at java.security.SecureClassLoader.defineClass(Unknown Source) ~[?:1.8.0_171]
        at org.bukkit.plugin.java.PluginClassLoader.findClass(PluginClassLoader.java:154) ~[spigot.jar:git-Paper-488]
        at org.bukkit.plugin.java.PluginClassLoader.findClass(PluginClassLoader.java:104) ~[spigot.jar:git-Paper-488]
        at java.lang.ClassLoader.loadClass(Unknown Source) ~[?:1.8.0_171]
        at java.lang.ClassLoader.loadClass(Unknown Source) ~[?:1.8.0_171]
        at java.lang.Class.forName0(Native Method) ~[?:1.8.0_171]
        at java.lang.Class.forName(Unknown Source) ~[?:1.8.0_171]
        at org.bukkit.plugin.java.PluginClassLoader.<init>(PluginClassLoader.java:82) ~[spigot.jar:git-Paper-488]
        at org.bukkit.plugin.java.JavaPluginLoader.loadPlugin(JavaPluginLoader.java:129) ~[spigot.jar:git-Paper-488]
        ... 6 more