WhatsApp is down with users worldwide reporting problems connecting to the messaging platform. The outage started around 3:45 PM EST with most users affected in Europe. At this time, WhatsApp has not provided any status updates or information as to what is wrong. We are unable to connect to WhatsApp in the U.S. and UK. We will update this story with information as soon as it becomes available. The company has not yet provided any indication as to the cause of the outage or status updates.
Source: https://www.bleepingcomputer.com/news/software/whatsapp-is-down-users-reporting-worldwide-outage/