My payment method disappeared from checkout, why?

A method (PayPal, Stripe, Authorize.Net) vanishes when it’s filtered out: disabled for that website scope, restricted by country or currency, blocked by a minimum-order rule, or hidden because a JavaScript error broke the Hyvä or Luma payment renderer. We trace which rule or error is removing it, checking config scope, the browser console, and the payment method’s isAvailable() logic, and bring it back at checkout.