Our Android Pos app was integrated Paypal Here SDK and was live taking real payments. The payment transactions went through fine in the start of the day, but later in the day our app got an error: com.paypal.paypalretailsdk.RetailSDKException: Request not authorized, then no payment could be processed unless the Paypal Here card reader is re paired with our pos again. It was a nightmare for the operator to do this when there were customers lined up.
Any idea how this was happened? We set the refresh token to the SDK in the code.
