Fix · Apache
Fix “Mixed content” on Apache
Load every script, stylesheet, image and frame over https:// (or use protocol-relative/absolute https URLs).
Header always set Content-Security-Policy "upgrade-insecure-requests"Verify the fix
Re-run the Mixed content check after deploying. Test config changes in staging first and keep a rollback: a wrong header can break a site faster than a missing one.
Other stacks: nginx · Caddy · Express / Node · Cloudflare