If you have issues and are unable to make or receive calls you need to enable a flag on the chrome settings, please go to this url:
And restart chrome
After that go to thisurl:
chrome://flags/#enable-webrtc-hide-local-ips-with-mdns and disable the option below.
Then, please relaunch Chrome and try again to make or receive a call.
If you still have issues, please feel free to contact our support by email on firstname.lastname@example.org.