We are using paypal v1 APIs, which were running fine, but from yesterday we are getting below error while trying to send invoice -
https://api.paypal.com/v1/invoicing/invoices/INV2-myInvoiceId/send. {"name": "UNPROCESSABLE_ENTITY","message": "The requested action cannot be performed, and may require interaction with APIs or processes outside of the current request","debug_id": "3924abcd068","details": [ {"field": "step_up_context","value": "82f2f19af898abcdefgh95a","issue": "AUTH_FLOW_REQUIRED" } ],"links": [ {"href": "https://developer.paypal.com/docs/api/invoicing/#errors","method": "GET" } ]}Here I am not able to understand, why it is giving error, I tried to google about 'AUTH_FLOW_REQUIRED' but didn't found anything specific.Please help me to solve it.