External link to Viber-bot. Promoting Viber Chatbot in Facebook Ads?

Question

Viber

External link to Viber-bot. Need a link to promote the bot in Facebook Ads to subscribe after switching from advertising. The problem is that when you go from the copied link "This account does not exist or has been removed"

Answer 1

Did the link work before?
Links are like this: https://viber.com/id_of_public and like this https://chats.viber.com/id_of_public and like this: viber://public?id=id_of_public . But the links of the first two types may not work for all publics, unlike the last one. Despite the fact that when choosing "share" Viber generates a link of the first type (often non-working).
I will add that viber:// links only work if you have the Viber application installed.