I cleaned the cache and tried with another browser but continue to get the same error. This is the link that I got following the steps you gave me.https://szh8j2byiyuekkbp-28302278795.shopifypreview.com/services/currency/update?currency=USD&country=U...
I have the same issue. It's happening to me with all the previews I'm doing, it started happening a day before the Shopify style update.https://sbdhjaz4qu3i75ty-28302278795.shopifypreview.com