1. SSL Certificate Not Installed Properly

Issue:

Your website shows a “Not Secure” warning or errors like ERR_SSL_PROTOCOL_ERROR.

Solution:

1. Verify that the SSL certificate is installed:
   • Log in to your hosting control panel (e.g., cPanel).
   • Check the SSL/TLS section to confirm that your domain has an active SSL certificate.
2. If not installed:
   • Use tools like Let’s Encrypt (free SSL) or purchase a certificate.
   • Contact your hosting provider for help installing the certificate.
3. Test your certificate using tools like SSL Checker.

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2. Mixed Content Errors

Issue:

Your website loads over HTTPS, but some elements (e.g., images, scripts, or stylesheets) still load over HTTP, causing browser warnings.

Solution:

1. Use a Plugin:
   • Install and activate the Really Simple SSL plugin.
   • It automatically redirects all HTTP URLs to HTTPS.
2. Manual Fix:
   • Check your site’s source code for URLs loading over HTTP.
   • Update these URLs to HTTPS directly in the database or theme files.
   • Use a tool like Why No Padlock to identify mixed content.
3. Database Search and Replace:
   • Use a plugin like Better Search Replace.
   • Search for http://yourdomain.com and replace it with https://yourdomain.com.

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3. Too Many Redirects

Issue:

Your site shows a “Too Many Redirects” error after enabling SSL.

Solution:

1. Check your .htaccess file:
   • Ensure you don’t have conflicting or multiple redirect rules.
   • Add or update the following rule:
     apache

     Copy code

     RewriteEngine On
RewriteCond %{HTTPS} !=on
RewriteRule ^(.*)$ https://%{HTTP_HOST}%{REQUEST_URI} [L,R=301]
2. Check WordPress settings:
   • Go to Settings → General in the WordPress Dashboard.
   • Ensure both WordPress Address (URL) and Site Address (URL) start with https://.

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4. Insecure Content Warning in Admin Area

Issue:

SSL is applied to the main site, but the admin area still shows insecure content.

Solution:

1. Add the following line to your wp-config.php file:
   php

   Copy code

   define('FORCE_SSL_ADMIN', true);

2. Clear your browser cache and revisit the admin area.

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5. Broken Links or Images After Enabling HTTPS

Issue:

Some links or images are broken after switching to HTTPS.

Solution:

1. Update the database URLs using the Better Search Replace plugin.
   • Search for http://yourdomain.com and replace with https://yourdomain.com.
2. Clear your WordPress cache using a caching plugin like WP Rocket or W3 Total Cache.

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6. Expired SSL Certificate

Issue:

Your site shows a “Certificate Expired” error.

Solution:

1. Renew your SSL certificate via your hosting provider.
2. If using Let’s Encrypt, ensure auto-renewal is enabled.
3. Reinstall the renewed certificate if necessary.

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7. SSL Not Redirecting Correctly

Issue:

Visitors can still access your site using http://.

Solution:

1. Force HTTPS via .htaccess:
   • Add the following to your .htaccess file:
     apache

     Copy code

     RewriteEngine On
RewriteCond %{HTTPS} !=on
RewriteRule ^(.*)$ https://%{HTTP_HOST}%{REQUEST_URI} [L,R=301]
2. Use a Plugin:
   • Install Really Simple SSL to handle redirection.

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8. Server Compatibility Issues

Issue:

Your server doesn’t support modern SSL/TLS protocols.

Solution:

1. Verify server compatibility using tools like SSL Labs.
2. Ensure your server uses TLS 1.2 or higher (contact your hosting provider to enable).

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9. Browser Caching Old SSL Errors

Issue:

Your browser shows SSL errors even after resolving them.

Solution:

1. Clear your browser cache.
2. Test your site in an incognito/private browsing mode.
3. Flush your DNS cache.

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10. WordPress REST API SSL Issues

Issue:

Your WordPress REST API returns errors due to SSL misconfiguration.

Solution:

1. Verify that your SSL certificate is properly installed and valid.
2. Use the Site Health tool in WordPress (Tools → Site Health) to identify SSL-related issues.
3. Contact your hosting provider if issues persist.