This problem should now be resolved. https://www.shopifystatus.com/incidents
If you are still having a problem, you may want to clear your cache then try again.
TIP: bookmark the incidents link to check in future if a problem you are having is just your site or a Shopify problem (it will save you time solving a problem that someone else is solving for you!)
Cloudflare outage is affecting access to SOME Shopify Sites from Some locations.At approx. 5pm on 21/6/22 there was a Cloudflare outage. Cloudflare provides a performance/security layer for Shopify and many other websites.
UPDATE: here is Cloudflare’s incident report:
https://blog.cloudflare.com/cloudflare-outage-on-june-21-2022/