Account & Licensing

Troubleshooting

Troubleshooting

Solutions to the most common issues.

Panel won't load

• Check Apache: sudo apache2ctl configtest && systemctl status apache2
• Check the panel services: systemctl status vantapanel-whm vantapanel-user
• Ensure ports 80/443 are open at your provider and not held by another web server.

"PHP is too old" during install

Reinstall on Ubuntu 22.04+ or Debian 12+, or install PHP 8.1+ (for example via the ondrej/php PPA) and re-run the installer.

Privileged actions fail

If actions like file operations fail with a worker error, the root worker or its sudo rule may not be set up — re-run the installer to fix it.

Mail won't send or bounces at Gmail

This is almost always deliverability: a missing PTR record, a blocked port 25, or missing SPF/DKIM records. The quickest fix is to relay through Brevo — see Email. Otherwise set up PTR, open port 25 outbound, and add SPF/DKIM in the Zone Editor.

Database connection errors

The database password lives in the panel's config file. Re-running the installer re-syncs it automatically.

Cloudflare 522 or redirect loop

• 522: port 443 is not reachable from Cloudflare — forward and allow it.
• Redirect loop: set Cloudflare SSL/TLS to Full (strict), not Flexible.

Still stuck?

Check the service logs for detail:

journalctl -u vantapanel-whm -n 100
journalctl -u vantapanel-user -n 100

Or contact support and we will help.