SSL certificate errors can confuse visitors and hurt your SEO rankings. Understanding common SSL issues and how to fix them quickly keeps your site secure and accessible.
Top 10 common SSL certificate errors
- Mixed Content Warning – HTTP resources loaded on HTTPS pages
- Certificate Expired – SSL certificate past its validity date
- Certificate Not Trusted – Browser doesn't recognize the certificate authority
- Domain Mismatch – Certificate issued for different domain
- Self-Signed Certificate – Certificate not issued by trusted CA
- Incomplete Certificate Chain – Missing intermediate certificates
- Certificate Revoked – CA has invalidated the certificate
- Weak Encryption – Outdated cipher suites
- Wrong Server Configuration – Incorrect SSL setup on server
- Clock Skew – Server time out of sync
Troubleshooting steps for each error
1. Mixed Content Warning
Problem: Your site loads over HTTPS but includes HTTP resources (images, scripts, stylesheets).
Solution:
- Update all URLs in your code to use HTTPS
- Use protocol-relative URLs (//example.com) or force HTTPS
- Check browser console for specific mixed content warnings
- Use Content Security Policy headers to block mixed content
2. Certificate Expired
Problem: Your SSL certificate has passed its expiration date.
Solution:
- Renew your certificate before it expires (set calendar reminders)
- Use auto-renewal features if available
- Install the new certificate immediately after renewal
3. Certificate Not Trusted
Problem: Browser shows "Not Secure" because certificate isn't from a recognized CA.
Solution:
- Use certificates from trusted Certificate Authorities (Let's Encrypt, DigiCert, etc.)
- Avoid self-signed certificates for production sites
- Ensure intermediate certificates are properly installed
How iServerGo's free SSL helps
All iServerGo hosting plans include free SSL certificates from Let's Encrypt, automatically renewed, so you don't have to worry about expiration errors. Our cpanel hosting in hong kong hosting, us web hosting, and eu web hosting makes SSL installation a one-click process.
If you're experiencing SSL errors, our support team can help troubleshoot and ensure your certificate is properly configured. Contact us for assistance with SSL setup and renewal.
Alex, Senior SRE is a hosting infrastructure specialist with years of experience managing mission-critical workloads. This article reflects real-world expertise in Security and is regularly updated to ensure accuracy.
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