For me also, many of my websites stopped working because my payment gateway uses TLS 1.0, and cloudlare disabled TLS 1.0 and 1.1 since yesterday with no alert…
I also suffered from this issue too. All traffic via CF using TLS 1.0 was closed.
EXCEPTION: System.Net.Http.HttpRequestException: An error occurred while sending the request. —> System.Net.WebException: The underlying connection was closed: Could not establish trust relationship for the SSL/TLS secure channel. —>
To force this on us without notification is unacceptable.
They state on the status page:
SSL for SaaS Issues
Resolved - This incident has been resolved.
Oct 27, 09:52 UTC
Investigating - Cloudflare is investigating issues related to certain SSL for SaaS custom hostnames not being accessible over HTTPS. We are actively working to resolve this issue.
Contacted them on Twitter, and got replay. They will roll out a fix later. For now, contact them if you need temporary solution (a free dedicated certification).