Steps to reproduce

• Set-up front-end SiteAccess en with currency GBP
• Open PageBuilder in en SiteAccess, use Product Collection Block, select a product
• Notice that after confirmation the list stays empty

You'll also notice a critical error in the logs: Cannot resolve currency. Missing configuration under the ibexa.system.[your_siteaccess].product_catalog.currencies key". Some debugging shows, that the system tries to resolve the price in the context of admin SiteAccess instead of the one being used inside PageBuilder (en). It is not common to have currencies configuration for admin SiteAccess hence this error.