We are currently experiencing an issue with third-party installments provider Affirm which is causing Shop Pay Installments options to be unavailabe to US storefront users. Please refer to Affirm's public status page for the latest updates.
We are aware of an issue affecting Storefront Search, Catalog API and Shop app search functionality. This may produce inconsistent or no search results and intermittent timeouts. We are actively investigating and will update you on steps toward resolution.