Proton has gone completely black to me.

"We've identified the network issue as being an upstream issue with Cloudflare and we're currently working with them to resolve it. For the very small percentage of our users who are affected by this, please accept our apologies for the temporary inconvenience and we hope to be fully back up as soon as possible."

Source: https://status.proton.me/

Cloudflare...it's a massive single point of failure.