Yup, I'm having the same issue. I upgraded to El Capitan and Xcode 7. I've applied the transport security fix and updated to AngularJS 1.4.6 for the $location fix, and I still get launch failures with -l:
2015-09-21 15:51:42.041 OpenNMS[22763:308385] Failed to load webpage with error: The operation couldn’t be completed. No such file or directory