Getting Unauthorized exception when encrypting

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3

Hlw MikeMcQ,
By mistake I missed sudo. When gave the command as sudo nginx -T, I got

nginx: the configuration file /etc/nginx/nginx.conf syntax is ok
nginx: configuration file /etc/nginx/nginx.conf test is successful

But the certification result is same. Getting

Certbot failed to authenticate some domains (authenticator: nginx). The Certificate Authority reported these problems:
Domain: security.shishunir.com
Type: unauthorized
Detail: 125.253.92.186: Invalid response from http://security.shishunir.com/.well-known/acme-challenge/rnv2fu0L4OIKxtLhFnw3glGGpcnxN5OgT8ERZj4sUjw: 404

Domain: www.security.shishunir.com
Type: unauthorized
Detail: 125.253.92.186: Invalid response from http://www.security.shishunir.com/.well-known/acme-challenge/krhVa_sGwAyTkq72omMGpkT977Mk1Fnlj0-BXCVnAUo: 404