Hi All, I am using Paypal express checkout in my web application. All works well when I am using test credentials provided by REST SDK of Python Test Credentials from https://github.com/paypal/PayPal-Python-SDK EBWKjlELKMYqRNQ6sYvFo64FtaRLRR5BdHEESmha49TM (Client ID) and EO422dn3gQLgDbuwqTjzrFgFtaRLRR5BdHEESmha49TM (Secret). But when I am using my credentials for seller sandbox account, Payment is created but it's not executing and giving me error like this. (See attached screenshot).
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