Safari 12.0.3 does not launch Pulse Secure app.
Tried with Pulse Secure 9.0.3, 9.0.2, 5.3.1, same results.
Mojave 10.14.3 (tried as well with Mojave 10.14.2, same results)
Popup displayed AFTER closing the sesion, saying "Do you want to allow this webpage to open "PulseApplicationLauncher"? Tried to select both "Cancel" or "Permit" buttons, same result >> Pulse Secure is not lauched.