Getting blocked on all cloudflare servers

May I ask how does the “blocking page” look like?
Can you share a screenshot of it?

Is this happening whenever you try to access any Website which is using Cloudflare, or only on your own Websites? :thinking:

May I ask have you tried using a different Web browser, or tried clearing your Web browser cache?
How about using a Private window (Incognito mode) or a VPN connection if possible?
Is it the same behaviour on your mobile phone (4G LTE, mobile data, cellular)?
Do you use any particular anti-virus software or some kind of an Web browser extension?

Kindly see the suggestion from below post:

https://www.reddit.com/r/CloudFlare/comments/oux1pe/captcha_this_challenge_page_was_accidentally/

May I suggest looking into below article for more additional details in terms related to the Cloudflare Captcha: