Title: Error using PayPal Express
Last modified: November 12, 2018

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# Error using PayPal Express

 *  Resolved [settlementplayers](https://wordpress.org/support/users/settlementplayers/)
 * (@settlementplayers)
 * [7 years, 6 months ago](https://wordpress.org/support/topic/error-using-paypal-express/)
 * When clicking the paypal button to pay, some users but not all, get the following
   error message on a white screen. I have not been able to find clear indication
   of what the problem is, is it a stage show setting or a paypal setting issue?
   any ideas?
 * Error using PayPal Express
    PayPal API UserName, Password or Signature Undefined

The topic ‘Error using PayPal Express’ is closed to new replies.

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## Tags

 * [paypal](https://wordpress.org/support/topic-tag/paypal/)

 * 0 replies
 * 1 participant
 * Last reply from: [settlementplayers](https://wordpress.org/support/users/settlementplayers/)
 * Last activity: [7 years, 6 months ago](https://wordpress.org/support/topic/error-using-paypal-express/)
 * Status: resolved