Got Http response code 403 when accessing PayPal Payouts

[yecoso_surprise]

I'm trying to use PayPal Payout API to send money from merchant account to one Personal account and always got the following response:

"Got Http response code 403 when accessing https://api.sandbox.paypal.com/v1/payments/payouts?sync_mode=false."

I'm using:

Account Type: Business

Test Environment: Sandbox

App Payout Feature: Enabled

Development Environment: PayPal PHP SDK

API Used: Asynchronous call (create function) unlike other problems that I saw in the forum where the problem caused due to the use of a synchronised call (createSynchronous us) which is deprecated.

[MTS_Chiranjeevi]

Hi @yecoso_surprise,

Thank you for contacting PayPal community.

We apologize for any inconvenience.

403 Forbidden

NOT_AUTHORIZED. Authorization failed due to insufficient permissions

I request to please cross check whether your using correct sandbox API credentials or third party permissions.

Please refer the detailed integration guide link.

I recommend to check with PayPal Customer Service via this link (then choose at the bottom one of the contact methods - email or phone). They will be able to verify your account settings. 

Thank you for understanding and patience.

Sincerely,

Chiranjeevi