SSL Error (Cloudflare)

Hello!

I moved my domain to another provider a few years ago and have had problems with SSL since then.

About three years ago I started using Cloudflare and with the use of proxies and full SSL/TLS encryption I didn't care about the error messages with Squarespace. 

Well, until I wanted to activate customer accounts!

Proxies for A and CNAME entries turned off. No change -> "SSL certificates aren't currently available for the domains below."
I also switched off Full SSL/TLS Encrypts. No change! -> "SSL certificates aren't currently available for the domains below."

All this has only resulted in my website no longer being accessible via HTTPS.

If I switch on all the cloudflare settings again, the site is accessible via https again, but a DNS error is displayed again in the Squarespace settings. This is just annoying!

From the few hits I get on google search on "Squarespace + Cloudflare", it seems that it is probably impossible to use both together. 😞

And the article "Using Cloudflare with Squarespace" contains almost no useful information.

Thanks for any tips and help!

Andy