Problem integrating In-app Purchase using revenue cat

After setting up the code and panel as per the documentation of app store connect and revenue cat, when I try to fetch the product from my app, it shows following error:

PlatformException(2, There was a problem with the App Store., {readable_error_code: STORE_PROBLEM, userCancelled: false, underlyingErrorMessage: An unknown error occurred, code: 2, message: There was a problem with the App Store., readableErrorCode: STORE_PROBLEM}, null)

Problem integrating In-app Purchase using revenue cat
 
 
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