Shopify New Customer Accounts 2026 — What Changed, What Broke, and What to Do

If you woke up one day and found your carefully crafted Shopify login popup was broken, your custom account page was gone, or your clients were calling about a strange new login flow — you are not alone. In February 2026, Shopify officially deprecated legacy customer accounts. For new stores, the old system is no longer available. For existing stores that had not opted in, it is no longer receiving updates or technical support. We hit this at Ogresto while building a client store. The popup logi