FYI, the new version (6.2) appears to have fixed the issue. I got it working by make sure the pulse secure client was updated, then removing the existing install of SubRosa, then reinstalling SubRosa.
https://www.pulsesecure.net/download/techpubs/current/851/pulse-client/pulse-secure-client-mobile/6.2rx/ps-pulse-ios-6.2r1-b71127-releasenotes.pdf