Viber links are not working in Webflow

My project:
[antikvar-project.webflow.io] (http://antikvar-project.webflow.io/)
In the menu I’m using a viber button. I’m tried to use different viber links, such as
viber://chat?number=%2Bxxxxxxxxxxxx
viber://chat?number=ххххххххх
viber://chat?number=+ххххххххх
but on click there is opened a new tab with this message:
Unable to connect to the site. Failed to find viber IP address.
What can I do?

Does this still work? I was under the impression it had been removed a while ago…

Yes, it’s still work )