Facebook Inc’s main social media site, popular photo-sharing platform Instagram and messaging app WhatsApp, were down for tens of thousands of users, according to outage tracking website Downdetector.com. Reuters could not immediately confirm the issue affecting the services. However, the error message on Facebook’s webpage suggested a Domain Name System (DNS) error. DNS allows web addresses to take users to their destinations. A similar outage at cloud company Akamai Technologies Inc took down multiple websites in July. “We’re aware that some people are having trouble accessing our apps and products,” the social media giant’s official Twitter handle said on Monday….