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  1. ,
    Expert tip

    The server rejects all jars that already belong to the server runtime (such as tomcat-**.jar, servlet**.jar). Consider substituting the CORS filter you're using for this one: https://goo.gl/ctQ7Fs

  2. ,

    This is thrown when the Java Virtual Machine (JVM) tries to load a particular class and the specified class cannot be found in the classpath. If you are using a Java version less than 8, upgrade because java.util.Base64 only comes with > Java 8.

Solutions on the web

via GitHub by renzotom
, 1 year ago
java.lang.NoClassDefFoundError: com/intellectualcrafters/plot/flag/AbstractFlag
via GitHub by Androkai
, 1 year ago
java.lang.NoClassDefFoundError: com/scarsz/discordsrv/google/common/collect/Lists
via GitHub by Daisyuki
, 1 year ago
java.lang.NoClassDefFoundError: net/pravian/aero/plugin/AeroPlugin
via GitHub by HammerHedd
, 1 year ago
java.lang.NoClassDefFoundError: org/primesoft/asyncworldedit/injector/classfactory/IClassFactory
via GitHub by jclgc
, 1 year ago
java.lang.NoClassDefFoundError: net/pravian/aero/plugin/AeroPlugin
via GitHub by Rocologo
, 1 year ago
java.lang.NoClassDefFoundError: net/minecraft/server/v1_7_R4/Packet
org.bukkit.plugin.InvalidPluginException: java.lang.NoClassDefFoundError: com/intellectualcrafters/plot/flag/AbstractFlag at org.bukkit.plugin.java.JavaPluginLoader.loadPlugin(JavaPluginLoader.java:133)[spigot.jar:git-Spigot-455072c-2f5bda8] at org.bukkit.plugin.SimplePluginManager.loadPlugin(SimplePluginManager.java:329)[spigot.jar:git-Spigot-455072c-2f5bda8] at org.bukkit.plugin.SimplePluginManager.loadPlugins(SimplePluginManager.java:251)[spigot.jar:git-Spigot-455072c-2f5bda8] at org.bukkit.craftbukkit.v1_10_R1.CraftServer.loadPlugins(CraftServer.java:298)[spigot.jar:git-Spigot-455072c-2f5bda8] at net.minecraft.server.v1_10_R1.DedicatedServer.init(DedicatedServer.java:203)[spigot.jar:git-Spigot-455072c-2f5bda8] at net.minecraft.server.v1_10_R1.MinecraftServer.run(MinecraftServer.java:535)[spigot.jar:git-Spigot-455072c-2f5bda8] at java.lang.Thread.run(Thread.java:745)[?:1.8.0_72]Caused by: java.lang.NoClassDefFoundError: com/intellectualcrafters/plot/flag/AbstractFlag at java.lang.Class.forName0(Native Method)[?:1.8.0_72] at java.lang.Class.forName(Class.java:348)[?:1.8.0_72] at org.bukkit.plugin.java.PluginClassLoader.<init>(PluginClassLoader.java:64)[spigot.jar:git-Spigot-455072c-2f5bda8] at org.bukkit.plugin.java.JavaPluginLoader.loadPlugin(JavaPluginLoader.java:129)[spigot.jar:git-Spigot-455072c-2f5bda8] ... 6 moreCaused by: java.lang.ClassNotFoundException: com.intellectualcrafters.plot.flag.AbstractFlag at java.net.URLClassLoader.findClass(URLClassLoader.java:381)[?:1.8.0_72] at org.bukkit.plugin.java.PluginClassLoader.findClass(PluginClassLoader.java:101)[spigot.jar:git-Spigot-455072c-2f5bda8] at org.bukkit.plugin.java.PluginClassLoader.findClass(PluginClassLoader.java:86)[spigot.jar:git-Spigot-455072c-2f5bda8] at java.lang.ClassLoader.loadClass(ClassLoader.java:424)[?:1.8.0_72] at java.lang.ClassLoader.loadClass(ClassLoader.java:357)[?:1.8.0_72] ... 10 more