Update: Cloudflare has issued a statement on the outage.
“Earlier today Cloudflare saw an outage across parts of our network. This was not the result of an attack. A network change in some of our data centres caused a portion of our network to be unavailable. Due to the nature of the incident, customers may have had difficulty reaching websites and services that rely on Cloudflare from approximately 0628-0720 UTC (2.28pm-3.20pm). Cloudflare was working on a fix within minutes, and the network is running normally now.