Issue with logging into sandbox account

[otec01]

Good day pls i want too ask  i have an account with Paypal now if I log in through the browser it work fine but when i want too log through sandbox  portal for development purpose it fails...error message is wrong   credentials hw do I fix this.. 

[MTS_Justin]

Hello,

You can't use a production account to login to our sandbox environment. You would need to create and use a sandbox account instead.

Our sandbox testing guide is available here : https://developer.paypal.com/docs/integration/paypal-here/sandbox-testing/

Thanks !