If you've received this error during your network connection test:
The DNS server on your network refused to provide an IP address for the Sense network time server. This is usually due to a misconfiguration of the DNS server on your network or overly aggressive content filtering on your network or at your internet service provider. We also recommend configuring an alternate DNS server if this issues persists. The Sense unit will attempt to fallback to the CloudFlare DNS servers if the locally configured DNS fails.
If you're still experiencing issues after troubleshooting, please reach out to the Support team.