How do I get Cloudflare Blacklist removed?

Then, I am afraid your best chance is to contact website owner to unblock your IP.

Yes, he/she can add you to “bypass” and “allow” for it’s own website, but in general Cloudflare as a service provider didn’t added your IP on any of the public blacklists neither on any “grey” or “black” list or other known RBL.

You got the information screen you’ve been blocked from accessing this website → contact owner about it.

Please, read the mentioned articles about 1020 Error and you will find more additional information why this error happens to you, either in my post it’s more explained in detail.