App doesn't work without www

Hi, hosted a vuejs site in https://www.pathum-fullstack.online/
This works fine. However if I try without www part like this https://pathum-fullstack.online/ site
gives me a privacy error. how do I fix this error?

@pathum Neither works for me. You might try deleting your custom domain from the Netlify dashboard and re-entering it. I see you are using external DNS, but you have A and CNAME records set up, so as long as those values are valid your site should load with SSL.

it seems to work for me - are you still receiving an error?