Non www breaking websites

My site is https://taswinterchess.netlify.app/
I am trying to use a custom domain I own, specifically taswinterchess.com
For some reason, this does not work, despite being setup properly. Only www.taswinterchess.com works, but even then the contact page refuses to load. Also, on both mobile and desktop chrome, the entire site has not worked on any devices.
I want to set the default to taswinterchess.com with the other redirecting to it, but when I do this neither works.
I suspect the issue is likely with the domain taswinterchess.com, but there is only checkmarks on the domain page.

Your website appears to work fine on both the URLs.