PAYEE_ACCOUNT_INVALID error in java android

[developerinfo]

E/paypal.sdk: request failure with http statusCode:400,exception:
E/paypal.sdk: request failed with server response:{"name":"PAYEE_ACCOUNT_INVALID","message":"Payee account is invalid.","information_link":"https://developer.paypal.com/docs/api/payments/v1/#error-PAYEE_ACCOUNT_INVALID","debug_id":"997a2fee90c59"}
E/paypal.sdk: PAYEE_ACCOUNT_INVALID

I'm encountering an error while working on my Java Android app.
I'm encountering an error while using a test credit card in test mode. Additionally, when I use the username and password of my sandbox, I encounter a 'resource_not_found' error. I have verified that all the credential data I'm sending is in the correct place, but it's still not working. I would appreciate any guidance on how to resolve this issue. Thank you.