I have deployed commcarehq but if you check on the address bar it shows a yellow triangle. How do i correct this certificate problem
Are you hosting your own CommCareHQ environment? If so, you may want to try the developer's forum for future issues: Developers - CommCare Forum
You probably need to setup letsencrypt to establish a SSL certificate. Here is a document describing that process:
https://github.com/dimagi/commcare-cloud/blob/master/docs/services/nginx/ssl.md