These was some of the weird problems in checkout, I try 4 devices of my family, latest android phone, latest laptop version up to date, iPhone 6s ios version 14+, iPhone 5s ios version 12+. The iPhone 5s were the one that are not able to checkout and shows the checkout screenshot you attached. Soo I thought it could be a theme issue and I use mine iPhone 5s to checkout other e-commerce site as well using dawn theme and it succeed to checkout. Not sure whats the problem here!
Topic summary
Main issue: Customers intermittently receive the error “There was a problem with our checkout. Refresh this page or try again in a few minutes” when moving from Cart to checkout. It occurs at or just before the email/address step and has been reported on Safari (older Mac, iPhone—sometimes after iOS updates) and Android; switching to Chrome sometimes works.
Initial guidance: Shopify Support requested context and suggested local troubleshooting (clear cache/cookies, incognito/private mode, disable extensions, try different browser/device, use Shopify app). Domain settings were reviewed; no definitive cause found.
Platform update: Shopify acknowledged a broader incident affecting admin and checkout and stated it was resolved, advising cache/cookie clears. Some users confirmed recovery.
Ongoing reports: Multiple merchants still see intermittent failures days to months later, with lost sales and inconsistent behavior (works one day, fails the next). Status page shows no current incident; Support advises opening authenticated tickets for backend investigation.
Workarounds noted: Clearing cache/cookies and switching browsers help some. For Android WebView (the embedded browser engine used by Android apps), enabling domStorageEnabled=true alongside javaScriptEnabled helped one developer.
Status: Partially resolved; recurring for a subset of stores. Root cause and a permanent fix have not been communicated; investigation appears ongoing. Screenshots are central to understanding the issue.