I am getting an error when checking out. User authentication failed. How do I fix this?

I am getting the following error right on the last step of checkout, after I enter CC info and press Confirm payment.

"There was a problem finalizing your purchase. User authentication failed Please go back and try again."

My paypal credentials do not have any white spaces.

What can be causing this error?

  • aecnu
    • WP Unicorn

    Greetings jesus vasquez,

    Welcome to WPMU DEV!

    Sorry to see that you are having an issue with your WordPress installation and the MarketPress plugin

    I am getting an error when checking out. User authentication failed. How do I fix this?

    You have all the credentials in place? API Username, API Password and the Signature? For PayPal Express? Or are you using another PayPal gateway?

    Please advise.

    Cheers, Joe

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