You should add non-www version to Networking instead of www version.

Write down records for your current domain, delete it from Networking and add non-www version to Networking (e.g. example.com).

To make www version works, go to that domain and add CNAME record with Name www and Value @.

With this, both versions should work. You could have to wait some time for DNS propagation (update) to occur.

1. check NS Record -> is there dns server record ?
2. input in A record -> 2.a example.com —-> xxx.yyy.zzz.ip 2.b www —-> xxx.yyy.zzz.ip

after save wait 1 or 2 hours , then try ping