1.Use https://portchecker.co/ to check whether TCP port 44158 is open.
2.If TCP port 44158 closed , to get started with port forwarding, check out https://portforward.com .
3.recommend enabling TCP Ports 44158 in both directions in your router .
4. If port-forwarding does not resolve this issue, contact your ISP for further instructions.
Read this online article for more information. https://docs.helium.com/troubleshooting/network-troubleshooting