According to Cloudflare, they have implemented a fix and are monitoring the results. Users trying to reach ACME from the affected servers and regions should be able to resume normal platform access and functionality.
Jun 11, 10:26 PDT
Due to a Cloudflare server disruption, anyone accessing ACME using the affected servers will experience degraded performance and may not be able to connect to ACME. Please see more specifics on Cloudflare's server status at https://www.cloudflarestatus.com/
Our engineering team is investigating the issue and we will update this incident as soon as possible.
Jun 11, 09:27 PDT