> For the complete documentation index, see [llms.txt](https://virtualcontact.gitbook.io/docs/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://virtualcontact.gitbook.io/docs/on-premises-installation/troubleshooting.md). # Troubleshooting Common On-Premises issues and solutions: * Container not starting: check docker compose logs \ for error messages * Database connection errors: verify PostgreSQL credentials and network connectivity between containers * SSL certificate errors: ensure the certificate is valid, not expired and covers the configured domain * WhatsApp API not connecting: verify outbound internet access on port 443 * High memory or CPU usage: review container resource limits in docker-compose.yml For issues not resolved locally, contact the Virtual Contact support team with your docker compose logs output.
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