Checkout integration erro

[anumanu]

Error: Error: Request to post https://www.sandbox.paypal.com/v1/oauth2/token failed with 400 error. Correlation id: df9c42724cb1, df9c42724cb1

{
"error": "invalid_client",
"error_description": "Client credentials are missing"
}

[MTS_Justin]

Hello,

If this is still an issue, please provide a new example which I can review