This stopped the Cuba extensions from running, so IntelliJ needed to be restarted.
stacktrace.txt (8.1 KB)
Hi Ray!
It looks like, that you use IntelliJ IDEA EAP, that is not supported yet.
For better experience, download the latest stable IntelliJ IDEA Download IntelliJ IDEA: The Capable & Ergonomic Java IDE by JetBrains