WebStorm 11.0.3 - startup error

Hi,
after downloading the latest version of WebStorm (11.0.3) i have the following error on startup:

[george@svil bin]$ ./webstorm.sh
.

Start Failed: Internal error. Please report to http://jb.gg/ide/critical-startup-errors

java.lang.NullPointerException
 at java.lang.ClassLoader.loadClass(ClassLoader.java:731)
 at java.lang.ClassLoader.loadClass(ClassLoader.java:707)
 at java.lang.Class.forNameImpl(Native Method)
 at java.lang.Class.forName(Class.java:219)
 at com.intellij.ide.Bootstrap.main(Bootstrap.java:34)
 at com.intellij.idea.Main.main(Main.java:91)


Also, an UI exception occurred on attempt to show above message:
java.lang.NullPointerException
 at java.lang.ClassLoader.loadClass(ClassLoader.java:731)
 at java.lang.ClassLoader.loadClass(ClassLoader.java:707)
 at java.lang.Class.forNameImpl(Native Method)
 at java.lang.Class.forName(Class.java:219)
 at javax.swing.SwingUtilities.loadSystemClass(SwingUtilities.java:1885)
 at javax.swing.UIDefaults.getUIClass(UIDefaults.java:697)
 at javax.swing.UIDefaults.getUI(UIDefaults.java:769)
 at javax.swing.UIManager.getUI(UIManager.java:1024)
 at javax.swing.text.JTextComponent.updateUI(JTextComponent.java:359)
 at javax.swing.text.JTextComponent.<init>(JTextComponent.java:333)
 at javax.swing.JEditorPane.<init>(JEditorPane.java:210)
 at javax.swing.JTextPane.<init>(JTextPane.java:101)
 at com.intellij.idea.Main.showMessage(Main.java:316)
 at com.intellij.idea.Main.showMessage(Main.java:292)
 at com.intellij.idea.Main.main(Main.java:94)

[george@svil bin]$

Any ideas about the cause?.
Thanks.