[23:18:53] [Server thread/ERROR]: Could not pass event PlayerJoinEvent to VS100widzow v1.0
org.bukkit.event.EventException: null
        at org.bukkit.plugin.java.JavaPluginLoader$1.execute(JavaPluginLoader.java:320) ~[server.jar:git-Spigot-5e4e7f3-2349feb]
        at org.bukkit.plugin.RegisteredListener.callEvent(RegisteredListener.java:70) ~[server.jar:git-Spigot-5e4e7f3-2349feb]
        at org.bukkit.plugin.SimplePluginManager.fireEvent(SimplePluginManager.java:529) [server.jar:git-Spigot-5e4e7f3-2349feb]
        at org.bukkit.plugin.SimplePluginManager.callEvent(SimplePluginManager.java:514) [server.jar:git-Spigot-5e4e7f3-2349feb]
        at net.minecraft.server.v1_14_R1.PlayerList.a(PlayerList.java:173) [server.jar:git-Spigot-5e4e7f3-2349feb]
        at net.minecraft.server.v1_14_R1.LoginListener.c(LoginListener.java:149) [server.jar:git-Spigot-5e4e7f3-2349feb]
        at net.minecraft.server.v1_14_R1.LoginListener.tick(LoginListener.java:53) [server.jar:git-Spigot-5e4e7f3-2349feb]
        at net.minecraft.server.v1_14_R1.NetworkManager.a(NetworkManager.java:230) [server.jar:git-Spigot-5e4e7f3-2349feb]
        at net.minecraft.server.v1_14_R1.ServerConnection.c(ServerConnection.java:119) [server.jar:git-Spigot-5e4e7f3-2349feb]
        at net.minecraft.server.v1_14_R1.MinecraftServer.b(MinecraftServer.java:1080) [server.jar:git-Spigot-5e4e7f3-2349feb]
        at net.minecraft.server.v1_14_R1.DedicatedServer.b(DedicatedServer.java:396) [server.jar:git-Spigot-5e4e7f3-2349feb]
        at net.minecraft.server.v1_14_R1.MinecraftServer.a(MinecraftServer.java:959) [server.jar:git-Spigot-5e4e7f3-2349feb]
        at net.minecraft.server.v1_14_R1.MinecraftServer.run(MinecraftServer.java:804) [server.jar:git-Spigot-5e4e7f3-2349feb]
        at java.lang.Thread.run(Thread.java:748) [?:1.8.0_201]
Caused by: java.lang.NoClassDefFoundError: com/nametagedit/plugin/NametagEdit
        at doknes.widzowie.Main.DolaczDruzyne(Main.java:89) ~[?:?]
        at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method) ~[?:1.8.0_201]
        at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62) ~[?:1.8.0_201]
        at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43) ~[?:1.8.0_201]
        at java.lang.reflect.Method.invoke(Method.java:498) ~[?:1.8.0_201]
        at org.bukkit.plugin.java.JavaPluginLoader$1.execute(JavaPluginLoader.java:316) ~[server.jar:git-Spigot-5e4e7f3-2349feb]
        ... 13 more
Caused by: java.lang.ClassNotFoundException: com.nametagedit.plugin.NametagEdit
        at java.net.URLClassLoader.findClass(URLClassLoader.java:382) ~[?:1.8.0_201]
        at org.bukkit.plugin.java.PluginClassLoader.findClass(PluginClassLoader.java:135) ~[server.jar:git-Spigot-5e4e7f3-2349feb]
        at org.bukkit.plugin.java.PluginClassLoader.findClass(PluginClassLoader.java:81) ~[server.jar:git-Spigot-5e4e7f3-2349feb]
        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 doknes.widzowie.Main.DolaczDruzyne(Main.java:89) ~[?:?]
        at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method) ~[?:1.8.0_201]
        at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62) ~[?:1.8.0_201]
        at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43) ~[?:1.8.0_201]
        at java.lang.reflect.Method.invoke(Method.java:498) ~[?:1.8.0_201]
        at org.bukkit.plugin.java.JavaPluginLoader$1.execute(JavaPluginLoader.java:316) ~[server.jar:git-Spigot-5e4e7f3-2349feb]
        ... 13 more