I cannot get SSL cert Certbot: error: unrecognized arguments: prefered-challenges=dns

-rw-r--r-- 1 root root 3892 Feb 17 09:16 dsrlearn.conf

nginx -t getting this

nginx: [emerg] open() "/etc/nginx/sites-enabled/dsrlearn.com.conf" failed (2: No such file or directory) in /etc/nginx/nginx.conf:66
nginx: configuration file /etc/nginx/nginx.conf test failed