Bugs do happen. Hence Sandro’s suggestion to analyze your site’s coding. It’s one thing to simply use .css and .js from third parties; it’s quite another to actually understand what they do and and don’t do; if they’re necessary or not. Your site is very weighed down with excess scripts some of which do throw errors. Simply because it may “work locally” for you does not mean it should function fine when online.
We havent, you have determined something but nobody can verify that.
If you are convinced it is an issue with Cloudflare and you dont want the community’s help your only option is to either debug it yourself - as I suggested quite a few times - or to contact support. It is your choice.
At this point, @Stage4000, you should reach out to Support to see if they can offer any insight into why you’re seeing a 521 error that we cannot reproduce. Additionally, if you’re still seeing the unrelated API error on dash, let them know that & include a recent screenshot as I cannot reproduce that in your account.
When you contact Support, they’ll ask you if you’ve verified your web server is running normally (Quick fix 1) & perhaps ask if you’ve reviewed the error logs to find the error. Your health checks could in fact be introducing the 521 if your host is rate limiting.
Note that checking to see if other cloudflare zones with the same IP & nameservers have the same issue or not is not one of the quick fix ideas - it does not help answer the question of why is this site having issues.
OK, closing this thread in a few minutes as it’s not driving towards resolution. I’ll update it here with root cause if & when we hear from Support.
To contact Cloudflare Customer Support, login & go to https://dash.cloudflare.com/?account=support and select get more help at the bottom of the page. Please give Support the complete details and link to your Community post.