If youâre facing an SSL certificate issue, here are some common causes and solutions to look into:
1. Certificate Not Installed Properly
Make sure your SSL certificate is correctly installed on your server. You can verify this using tools like SSL Checker or Why No Padlock.
2. Mixed Content Warnings
Your site may be trying to load resources (like images, CSS, or scripts) over HTTP instead of HTTPS. This causes browser warnings. Use browser developer tools (F12 â Console tab) to identify and update those links to HTTPS.
3. Certificate Expired
Check if your SSL certificate has expired. If so, renew it through your SSL provider or hosting panel.
4. Domain Mismatch
The certificate should match the domain or subdomain youâre using. For example, a certificate for example.com
wonât work for www.example.com
unless itâs a wildcard or multi-domain (SAN) certificate.
5. Not Redirecting to HTTPS
If your site is accessible via HTTP, set up a redirect to force HTTPS. This can be done via .htaccess
, server config, or plugins (if using a CMS).
Example for .htaccess
:
apache
CopyEdit
RewriteEngine On
RewriteCond %{HTTPS} off
RewriteRule ^(.*)$ https://%{HTTP_HOST}%{REQUEST_URI} [L,R=301]
6. Hosting Platform Issues
If youâre on shared hosting or using a control panel like cPanel or Plesk, you may need to reissue or reinstall the SSL certificate. Many hosting providers support Letâs Encrypt for free SSL installation.
If you can share more details, such as your domain or the exact browser error message (e.g., âNET::ERR_CERT_AUTHORITY_INVALIDâ), I can help you troubleshoot more specifically.
Also, let me know if youâre using a CMS (like WordPress or Magento) or a server type (Apache, NGINX, etc.) â that helps narrow down the solution.