Just letting people know that Intelephense V1.3.0 (by Kristófer Reykjalín) crashes Nova 12b1 as soon as I open a project that uses it. Unfortunately, my last open project used it, so almost as soon as Nova started, it would crash. I had to hold Cmd-Shift-W when launching Nova 12b1 to close my previous project to be able to get into Nova.
It’s worked for me sporadically. 
At first it instantly crashed like it did for you, then it inexplicably started working – but then I did something that would have made Intelephense show a warning (a function parameter that was unused in the body of the function), and that instantly crashed.
We believe this should be resolved in Nova 12b2, which was released this morning. If you are still seeing it after updating, let us know!
I ran 12b2 for most of the afternoon and it worked great! I had to use search a lot, and it definitely feels much quicker!