Error 526 Invalid SSL Certificate means the CDN connected to your origin server but rejected the SSL certificate as invalid. The secure connection fails during certificate validation. This error appears only when strict SSL validation is enabled. The problem is always on the origin server. Quick Fix Install a valid SSL certificate on the origin

Error 525 SSL Handshake Failed means the CDN could not establish a secure HTTPS connection with your origin server. The encryption handshake fails before any content is delivered. This happens between the CDN and your server — not in the user’s browser. The root cause is almost always SSL configuration on the origin. Quick Fix

Error 524 Timeout Occurred means the CDN successfully connected to your origin server, but the server did not finish processing the request in time. The connection works. The server responds. It is simply too slow. Quick Fix Check CPU and memory usage on the origin server. Restart web server and PHP services. Identify long-running database

Error 523 Origin Is Unreachable means the CDN cannot reach your origin server at all. The network connection fails before any response is received. This is a connectivity issue. It usually points to DNS errors, incorrect IP configuration, firewall blocks, or server downtime. Quick Fix Verify your server is online and reachable via its IP

Error 520 Unknown Error means the CDN received an unexpected or empty response from the origin server. The connection succeeds, but the reply is invalid. This error is vague by design. It signals that something broke between your server and the proxy layer. The fix requires systematic checking. Quick Fix Reload the page and clear