Friend, I'm going to to switch to another SDK.The SDK has been officially defunct and no longer supports it. https://www.paypal-status.com/history/eventdetails/14397
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look this, https://www.paypal-community.com/t5/SDKs/Not-able-to-make-sandbox-transaction-in-my-android-app-for/m-p/2502639/highlight/false#M1053 I think we're running into the same problem
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