Error 521 to specific links


Time by time i am getting error 521 for random css and js files.

For instance may lead to error 521 but loads just fine.

All seems to work fine after switching on the development mode from cloudflare->catching.

I am using plesk Obsidian on AWS server, and my domain has letsencrypt ssl certificate.

I run this issue with plesk support and they confirmed that there are no local issues on the server.

I really hope that somebody from here will be able to help.

Hmm, sounds like rate limiting, is this still an issue? Some 521 ideas here, Community Tip - Fixing Error 521: Web server is down

This topic was automatically closed 30 days after the last reply. New replies are no longer allowed.