Intellij IDEA 13 - Can't open Project Structure dialog anymore

as already described in title, i'm not able to open the project structure dialog window in intellij anymore.

neither the shortcut (Ctrl+alt+shift+s) nor the menu element under File -> Project Structure nor the little button in the upper right corner do work.

Clarification: Menu element :

This "bug" occured suddenly as I wrote a web (vaadin/maven) project and tried to set up glassfish, where i often had to switch to the project structure dialog.

Since the first occurence i wasn't able to fix it by restarting intellij or switching projects.

This also happened on my laptop running the same intellij and windows version (Ultimate 13.0.1 Build: 133.331 on Windows 7 x64)

i appreciate any help!

Your log shows that it is a bug in IntelliJ IDEA - they are trying to create file passing null pathname. Try to delete project files and reopen project from scratch (maybe you've lost some file) - if it won't help then you should create an issue here: http://youtrack.jetbrains.com/ - You can even copy-paste text from your question and attach stacktrace