It seems that following an outage of Cloudflare on DNS resolutions, users can experience issues resolving our domains.
The incident on Cloudflare side: https://www.cloudflarestatus.com/incidents/b888fyhbygb8
EDIT 21:35 UTC: The DNS resolution seems to be back again, our services are currently reachable from our point of view. It may vary depending on your location.
EDIT 22:51 UTC: Cloudflare implemented a fix and we did not see any new issue since then. This incident is now closed.