Help with Website error

[deb.north]

I purchased my domain through GoDaddy for my Shopify website. Everything worked fine until I hired a designer to refresh my site. Now yesathleticsusa.com works but www.yesathleticsusa.com does not. Error: This page isn’t available

Please check that the URL entered is correct or try loading the page again.

If you’re still having trouble, please contact the website owner.

I have had many smart people look into this and update DNS settings. Shopify is saying it is “Cloudflare’s fault”. I had never heard of Cloudflare until last week. Here is specifically the last message I had from Shopify:
Domain is pointed to Shopify but did not return Shopify headers.
Most likely, someone who previously owned the domain before you bought it had a Cloudflare account and the DNS settings and SSL certificates in that account may be taking priority over Shopify’s settings.

Any ideas? Has anyone run into this before?

[sdayman]

You’re using GoDaddy DNS to point to Shopify. Is there a way you can get GoDaddy to forward requests with www over to the URL without www? Or maybe replace your “A” record over at GoDaddy with a CNAME that points to your ‘www’.