Client Sent an HTTP Request to an HTTPS Server: Causes and Fixes

• 20 June 2026
• by: Omar Farouk
• in: SSL Certificates
• Tags: Apache, HTTPS, Nginx, SSL, Web Server Errors
• note: no comments

Learn why the 400 Bad Request ‘client sent an HTTP request to an HTTPS server’ error happens in NGINX and Apache, and how to fix it with correct SSL config.

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