The most likely cause is that the UDF needs to be declared as 'SECURE' (Option B). When a UDF accesses objects in a different security context (such as a secure view provided by the provider), it must be declared as SECURE to inherit the privileges of the caller (in this case, the application). This allows the UDF to access the data without requiring the consumer to have direct access to the underlying tables. A: Granting direct access to the underlying tables defeats the purpose of using a secure view and is generally not recommended. C: There is no explicit authorization needed in the manifest for a native app to access secure views if the secure UDF accesses the view D: While data masking policies could cause issues, the 'Authorization error' specifically points to a privilege problem, making the SECURE UDF the more likely culprit. E: The OWNERSHIP privilege on the application is not relevant to the UDF's ability to access data within the provider account.