StoreKit SKStoreProductViewController loadProductWithParameters function callback SKErrorStoreProductNotAvailable

What's the reason? Since about 19:00 on November 30, 2020,
Storekit SKStoreProductViewController loadProductWithParameters:completionBlock: API received a lot of exception information, error status code = 5.

Error Domain=SKErrorDomain Code=5 "(null)"

SKErrorStoreProductNotAvailable API_AVAILABLE(ios(3.0), macos(10.15), watchos(6.2)),                        // Product is not available in the current storefront


StoreKit SKStoreProductViewController loadProductWithParameters function callback SKErrorStoreProductNotAvailable
 
 
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