Based on the search results, there is no clear indication of what happened to Viber today. Some websites like Downdetector and Is The Service Down? show that there were some problems with Viber in the past few days, but at the time of writing this response, Viber is not down according to Downtime Expert. It is possible that there were some temporary issues with the app or website that have since been resolved. If users are experiencing issues with Viber, they can try restarting their phone, checking for updates, or contacting Viber customer support for assistance.