MarketPress Plugin won't work. It gave an error message when trying to checkout the product.

Hi there,

I'm having an error when trying to checkout the product. This is the errror message that comes out:
"There was a problem finalizing your purchase. User authentication failed Please go back and try again."

Do you think we should get the paypal Advance to make it work? Right now, we have paypal pro set up in the marketpress plugin. Please let me know. And any help will be appreciated.

Breakout Marketing, LLC


  • PC

    Hey Mark,

    Greetings and thanks for posting on the forums.

    Can you please let me know the link to the site with issues ?

    Are you running PayPal in live mode or sandbox mode. If you are running live, did you test with sandbox mode ?

    Most of the time when this error occurs it is often that a blank space is added to the credentials when copying and pasting them - which is a common occurrence.

    Please check that the API User Name, Password, and Signature do not have spaces at the ends of them.

    USER and VENDOR should be the paypal MERCHANT login (not the email)

    PARTNER should be paypal

    PWD should be password for the merchant account.

    Please advise on all of the above questions so that we can try and narrow down the issue.

    Cheers, PC

  • PC

    Hello there Mark,

    Sorry for the delay here. It supports PayPal Express and PayFlow Pro

    Are you still facing the same issue ?

    If yes, I will need to have a closer look at your site with more details.

    Can you please send me your login details via our secure contact form

    1: Mark the email to my attention

    Attn: PC

    2: Include a link of this thread in the email

    3: Include FTP and WordPress super admin details.

    4: While filling the form, select "I have a different question" from the list.

    Looking forward for a response on this.

Thank NAME, for their help.

Let NAME know exactly why they deserved these points.

Gift a custom amount of points.