Common cPanel and Plesk errors and how to fix them

Common cPanel Errors & Fixes

1. “500 Internal Server Error”

What it means: There’s a problem with your website’s code, permissions, or .htaccess file.

How to fix:

  • Check .htaccess: Temporarily rename your .htaccess file to see if your site loads.
  • File Permissions: Make sure files are set to 644 and folders to 755.
  • Error Logs: In cPanel, check “Errors” under Metrics for more details.
  • Plugin/Theme Issues (for WordPress): Deactivate plugins/themes via File Manager or FTP.

2. “503 Service Unavailable”

What it means: Your site’s resources are maxed out, or a service (like Apache or PHP) isn’t running.

How to fix:

  • Resource Usage: Check “CPU and Concurrent Connection Usage” in cPanel.
  • Restart Services: If you have access, restart Apache or PHP-FPM.
  • Disable Plugins: If on WordPress, a faulty plugin could be the culprit.

3. Login Issues (“Invalid Login” or “Login Disabled”)

What it means: Wrong password, IP blocked, or account suspended.

How to fix:

  • Reset Password: Use the password reset link.
  • Check IP Block: Contact your host if you think your IP is blocked.
  • Check Suspension: If your account is suspended, check your email for details or contact your host.

4. Email Errors (“SMTP Error”, “Mailbox Quota Exceeded”, etc.)

What it means: Issues with sending/receiving email, often due to configuration or storage limits.

How to fix:

  • Check Quota: Increase mailbox size in cPanel > Email Accounts.
  • Settings: Double-check email client settings (SMTP/IMAP, ports, SSL).
  • SPAM/Junk Folders: Sometimes emails are delivered to junk.

5. “404 Not Found”

What it means: The requested page or file doesn’t exist.

How to fix:

  • Check URL: Make sure it’s correct.
  • File Exists: Use cPanel File Manager to confirm the file/folder is there.
  • .htaccess Rules: Incorrect rewrite rules can cause this—try disabling custom .htaccess temporarily.

Common Plesk Errors & Fixes

1. “502 Bad Gateway”

What it means: The web server (like Nginx) can’t communicate with the backend (like Apache or PHP-FPM).

How to fix:

  • Restart Services: In Plesk, go to Tools & Settings > Services Management and restart Apache/Nginx/PHP-FPM.
  • Check PHP Settings: Make sure the PHP handler is correct for your domain.

2. “Error: Connection Refused” or “Server Not Found”

What it means: DNS issues or the web server isn’t running.

How to fix:

  • DNS Settings: Make sure your domain points to the correct server.
  • Restart Web Server: Use Tools & Settings > Services Management.

3. “503 Service Unavailable”

(Similar to cPanel)

How to fix:

  • Resource Usage: Check Plesk’s Resource Usage statistics.
  • Restart PHP Handler: Go to Tools & Settings > Services Management and restart PHP.

4. SSL/TLS Certificate Errors

What it means: Site is marked as “Not Secure” or you get certificate warnings.

How to fix:

  • Renew/Install Certificate: Go to Domains > [Your Domain] > SSL/TLS Certificates and install or renew.
  • Force HTTPS: Update your site settings to force HTTPS.

5. Backup or Restore Errors

What it means: Backup fails due to space issues or file/folder permissions.

How to fix:

  • Free Up Space: Delete old backups or unused files.
  • Check Permissions: Make sure Plesk has permission to access all directories.

Final Tips

  • Check Error Logs: Both cPanel and Plesk have error logs—these are goldmines for troubleshooting.
    • cPanel: “Errors” under Metrics
    • Plesk: Tools & Settings > Logs
  • Contact Support: If you’re stuck or unsure, your hosting provider’s support team can help.
  • Back Up First: Before making big changes, always take a backup!

In summary:
Most cPanel and Plesk errors can be solved with a bit of detective work—start with logs, double-check your settings, and don’t hesitate to ask for help if you need it. With a little patience, you’ll usually have things running smoothly again in no time!

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