Problems with RevenueCat Implementation for iOS – with Flutter code

As soon as I try to do it in my code

Future loadProducts() async {
  try {
    final offerings = await Purchases.getOfferings();

    if (offerings.current == null) {
      log("No offering found", name: "RevenueCat");
      return;
    }

    final packages = offerings.current!.availablePackages;

    for (final package in packages) {
      log("Product: ${package.storeProduct.title}", name: "RevenueCat");
      log("Price: ${package.storeProduct.priceString}", name: "RevenueCat");
      log("ID: ${package.storeProduct.identifier}", name: "RevenueCat");
    }

  } catch (e) {
    log("Error fetching products: $e", name: "RevenueCat");
  }
}

The following error happens, running on my physical device:

There's a problem with your configuration. None of the products registered in the RevenueCat dashboard could be fetched from App Store Connect (or the StoreKit Configuration file if one is being used). 
More information: 
More information:  There's a problem with your configuration. None of the products registered in the RevenueCat dashboard could be fetched from App Store Connect (or the StoreKit Configuration file if one is being used). 
More information: 
[RevenueCat] Error fetching products: PlatformException(23, There is an issue with your configuration. Check the underlying error for more details.
             More information:  There's a problem with your configuration. None of the products registered in the RevenueCat dashboard could be fetched from App Store Connect (or the StoreKit Configuration file if one is being used). 
             More information: , {readableErrorCode: CONFIGURATION_ERROR, underlyingErrorMessage: , readable_error_code: CONFIGURATION_ERROR, code: 23, message: There is an issue with your configuration. Check the underlying error for more details.
             More information:  There's a problem with your configuration. None of the products registered in the RevenueCat dashboard could be fetched from App Store Connect (or the StoreKit Configuration file if one is being used). 
             More information: }, null)

I’m starting to go crazy 🥹, since apparently everything is correctly configured and connected

Everything looks correct, I have no idea what the error is.