Netbeans8.1 vaadin plugin installation not working

I downloaded the version 1.1.1 that is linked in the download section of the official page. Evertime I try installing it I get this error. The weird thing about it is that netbeans thinks the plugin has been installed afterwards and it actually is but the learn\tutorial doesn’t work so I assume that it hasn’t installed correctly / all that is required.
I have also tried using the plugin that is linked in netbeans under tools plugins in the programm it self but causes same error.


I just put the jars in the classpath in Netbeans and it works great.
I posted in another thread the jars you need.