title: java.io.IOException: Invalid Keystore format
body: <p>Does anyone know how to solve this?
  I tried many things, but none of them worked.</p>
  <p>And when I click more details I get this:</p>
  <pre><code>at sun.security.provider.JavaKeyStore.engineLoad(Unknown Source)
  atsun.security.provider.JavaKeyStore$JKS.engineLoad(Unknown Source)
  at java.security.KeyStore.load(Unknown Source)
  at com.sun.deploy.security.RootCertStore$1.run(Unknown Source)
  at java.security.AccessController.doPrivileged(Native Method)
  at com.sun.deploy.security.RootCertStore.loadCertStore(Unknown Source)
  at com.sun.deploy.security.RootCertStore.load(Unknown Source)
  at com.sun.deploy.security.RootCertStore.load(Unknown Source)
  at com.sun.deploy.security.ImmutableCertStore.load(Unknown Source)
  at com.sun.deploy.security.TrustDecider.isAllPermissionGranted(Unknown Source)
  at com.sun.deploy.security.TrustDecider.isAllPermissionGranted(Unknown Source)
  at sun.plugin.security.PluginClassLoader.getPermissions(Unknown Source)
  at java.security.SecureClassLoader.getProtectionDomain(Unknown Source)
  at java.security.SecureClassLoader.defineClass(Unknown Source)
  at java.net.URLClassLoader.defineClass(Unknown Source)
  at java.net.URLClassLoader.access$000(Unknown Source)
  at java.net.URLClassLoader$1.run(Unknown Source)
  at java.security.AccessController.doPrivileged(Native Method)
  at java.net.URLClassLoader.findClass(Unknown Source)
  at sun.applet.AppletClassLoader.findClass(Unknown Source)
  at java.lang.ClassLoader.loadClass(Unknown Source)
  at sun.applet.AppletClassLoader.loadClass(Unknown Source)
  at java.lang.ClassLoader.loadClass(Unknown Source)
  at sun.applet.AppletClassLoader.loadCode(Unknown Source)
  at sun.applet.AppletPanel.createApplet(Unknown Source)
  at sun.plugin.AppletViewer.createApplet(Unknown Source)
  at sun.applet.AppletPanel.runLoader(Unknown Source)
  at sun.applet.AppletPanel.run(Unknown Source)
  at java.lang.Thread.run(Unknown Source)
  </code></pre>