Sir my website shows this error how i can resolve
https : // mydomain / cgi-sys / defaultwebpage.cgi
I did some checking and it looks like your site is returning a 522 error before quickly switching to 502. You probably just need to make sure that your have allowlisted Cloudflare IPs to be able to reach your site.
https://support.cloudflare.com/hc/en-us/articles/201897700-Step-4-Recommended-First-Steps-for-all-Cloudflare-users