The game doesnt work and what it says

[Kitsune474]

When I click on autohaven it opens up a black screen and says in the top corner "An error has occurred! The error has been reported" and there are two buttons to click on one closes the window and the other (details) says this : java.lang.NullPointerException
at haven.HavenPanel.rootdraw(HavenPanel.java:279)
at haven.HavenPanel.run(HavenPanel.java:521)
at java.lang.Thread.run(Unknown Source)