Когда я открываю андроид студию, это всплывающее окно ... В основном это InvocationTargetException и EventExecutorGroup или что-то еще .. пожалуйста, помогите

Internal error. Please report to https://code.google.com/p/android/issues

com.intellij.ide.plugins.PluginManager$StartupAbortedException: java.lang.reflect.InvocationTargetException
    at com.intellij.ide.plugins.PluginManager.lambda$start$0(PluginManager.java:79)
    at java.lang.Thread.run(Thread.java:745)
Caused by: java.lang.reflect.InvocationTargetException
    at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
    at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62)
    at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
    at java.lang.reflect.Method.invoke(Method.java:498)
    at com.intellij.ide.plugins.PluginManager.lambda$start$0(PluginManager.java:76)
    ... 1 more
Caused by: java.lang.NoClassDefFoundError: io/netty/util/concurrent/EventExecutorGroup
    at java.lang.ClassLoader.defineClass1(Native Method)
    at java.lang.ClassLoader.defineClass(ClassLoader.java:763)
    at java.lang.ClassLoader.defineClass(ClassLoader.java:642)
    at com.intellij.util.lang.UrlClassLoader._defineClass(UrlClassLoader.java:278)
    at com.intellij.util.lang.UrlClassLoader.defineClass(UrlClassLoader.java:274)
    at com.intellij.util.lang.UrlClassLoader.findClass(UrlClassLoader.java:228)
    at java.lang.ClassLoader.loadClass(ClassLoader.java:424)
    at java.lang.ClassLoader.loadClass(ClassLoader.java:357)
    at com.intellij.idea.SocketLock.lambda$lock$2(SocketLock.java:148)
    at com.intellij.idea.SocketLock.underLocks(SocketLock.java:179)
    at com.intellij.idea.SocketLock.lock(SocketLock.java:124)
    at com.intellij.idea.StartupUtil.lockSystemFolders(StartupUtil.java:327)
    at com.intellij.idea.StartupUtil.prepareAndStart(StartupUtil.java:130)
    at com.intellij.idea.MainImpl.start(MainImpl.java:20)
    ... 6 more
Caused by: java.lang.ClassNotFoundException: io.netty.util.concurrent.EventExecutorGroup
    at com.intellij.util.lang.UrlClassLoader.findClass(UrlClassLoader.java:224)
    at java.lang.ClassLoader.loadClass(ClassLoader.java:424)
    at java.lang.ClassLoader.loadClass(ClassLoader.java:357)
    ... 20 more

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