504 Gateway Timeout means a server acting as a gateway or proxy did not receive a response from the upstream server in time. The request reaches the gateway server, but the backend service takes too long to respond. When the timeout limit is exceeded, the gateway stops waiting and returns a 504 error. Quick Fix … Read more
502 Bad Gateway appears when a server acting as a gateway or proxy receives an invalid response from an upstream server. The request reaches the gateway, but the backend service fails to respond correctly. As a result, the browser cannot load the page. Quick Fix Reload the page after a few seconds. Clear browser cache … Read more
503 Service Unavailable means the server is running but cannot process the request right now. The web server is reachable, but the application or backend service is temporarily unable to respond. This error usually appears during traffic spikes, maintenance, or backend failures. Quick Fix Reload the page after a few seconds. Check server CPU and … Read more
Too Many Redirects After SSL appears when a browser is trapped in a redirect loop after HTTPS is enabled. The request keeps bouncing between URLs and never reaches the final page. The browser eventually stops the process and displays a redirect error. Quick Fix Clear browser cookies and cache. Check HTTP → HTTPS redirect rules … Read more
SSL Certificate Not Trusted means the browser cannot verify the identity of a website. The secure HTTPS connection is blocked because the certificate cannot be validated. This usually happens when the certificate chain is incomplete, the certificate is self-signed, expired, or installed incorrectly. Quick Fix Check if the SSL certificate is expired. Confirm it was … Read more
NET::ERR_CERT_AUTHORITY_INVALID means the browser does not trust the website’s SSL certificate. The secure connection is blocked. This happens when the certificate cannot be verified against a trusted Certificate Authority (CA). Quick Fix Check if the SSL certificate is expired. Make sure it’s issued by a trusted CA (not self-signed). Install the full certificate chain (server … Read more
Mixed Content Error occurs when an HTTPS page loads resources over HTTP. The page is secure, but some elements are not. Modern browsers block insecure resources. This breaks functionality and weakens trust. Quick Fix Open DevTools → Console → identify blocked HTTP URLs. Replace all http:// links with https://. Update WordPress Site URL to HTTPS. … Read more
SSL Handshake Failed (Browser Version) means your browser and the server could not agree on encryption settings. The secure HTTPS connection stopped before it started. This usually happens because of outdated TLS support, invalid certificates, or strict security settings. Quick Fix Update your browser to the latest version. Clear SSL state and browser cache. Check … Read more
ERR_SSL_PROTOCOL_ERROR means the browser failed to establish a secure HTTPS connection. The SSL/TLS negotiation broke before encrypted communication could begin. This is a certificate or protocol configuration problem. It can occur on the server, CDN, or client side. Quick Fix Ensure a valid SSL certificate is installed and not expired. Confirm the certificate matches the … Read more
Cloudflare Error 1020 Access Denied means Cloudflare blocked a request based on a firewall rule. The request never reached your server. This is not downtime. It is a security rule doing exactly what it was configured to do. Quick Fix Open Cloudflare → Security → Events. Find the blocked request using the Ray ID. Identify … Read more