Did you try to quit the browser and try again? Or reboot the laptop and try again?
What does Error 1020 Access Denied mean?
The error messages that start with 1xxx refer to connection problems on sites that use the Cloudflare proxy. One of them is the Error 1020 Access Denied. This indicates that you’ve violated a firewall rule and your request is blocked.
Before going into detail about what the error 1020 means, let’s talk briefly about using CDNs. They are a resource used to improve the performance of access to the website.
In practice, there are copies of the website’s files spread over the various servers that are part of the CDN. Thus, the user will be connected to the server that is closest to their location.
Besides increasing performance, Cloudflare also offers some security features that help protect the website from cyber attacks. Among them, the DDoS attack, when several simultaneous accesses to the page occur, either by real users or by so-called zombie computers.
https://rockcontent.com/blog/error-1020-access-denied
I finished a couple of games of chess and then clicked on the notification that my forum thread had a new comment. This warning was the result. Several efforts to exit the site and return produced the same result. That was on my laptop. I can still connect with a mobile device.