Oculus browser crash calling URL

I'm developing a virtual Tour using Krpano software.
here the link of the tour (work in progress)
http://demo.visual4d.it/VR_expo/tour.html

My actual problem is when is call a web URL from inside the tour (example: pressing the "gear"  icon on the floor): with all the standard Browser like Firefox, Chrome, Safari , etc work: close the tour and open the web URL, while in Oculus Browser crash everytime.

My Krpano code is:
onclick="openurl('https://www.exposrl.com/vetrine_vino/teca_m/?configuratore',target_self)"

Can anyone give me an help?

Many thanks!

Luca