Welcome to the Netlify Forum, and thanks for reaching out! The custom domain you shared above is resolving for all tested locations here: DNS Checker - DNS Check Propagation Tool . You mentioned this site is new-- did you just get things set up in the past two days? In many cases, this error will resolve in 48 hours or so. (You can read about why that happens here)
If after 48 hours the error persists, please install dig locally and share it with us. The output of the following command might tell us why the DNS lookup isn’t working for you locally.
Lastly, here are a few threads that may be beneficial to you, as these Forums member encountered the exact same error.