Title: Critical Error When Checking Out
Last modified: December 5, 2016

---

# Critical Error When Checking Out

 *  [plumwd](https://wordpress.org/support/users/plumwd/)
 * (@plumwd)
 * [9 years, 6 months ago](https://wordpress.org/support/topic/critical-error-when-checking-out/)
 * Hi there,
 * I am currently working on a site and trying to integrate CardConnect with WooCommerce.
   I have all the information entered in the settings based on what the account 
   manager gave us, but am receiving the following error when attempting to checkout
   in sandbox mode.
 * > Payment error: A critical server error prevented this transaction from completing.
   > Please confirm your information and try again.
 * What could be causing the error?
 * Thanks!
    -  This topic was modified 9 years, 6 months ago by [plumwd](https://wordpress.org/support/users/plumwd/).

Viewing 2 replies - 1 through 2 (of 2 total)

 *  [middlemountain](https://wordpress.org/support/users/middlemountain/)
 * (@middlemountain)
 * [9 years, 6 months ago](https://wordpress.org/support/topic/critical-error-when-checking-out/#post-8516810)
 * In most cases, the error is caused if the username or password in your settings
   are entered incorrectly. I would suggest you give CardConnect support a call 
   and confirm you have the correct values.
 *  [Liquidpen](https://wordpress.org/support/users/liquidpen/)
 * (@liquidpen)
 * [9 years, 5 months ago](https://wordpress.org/support/topic/critical-error-when-checking-out/#post-8648595)
 * I am having this same problem.. All my info is correct. Checked w/card connect..

Viewing 2 replies - 1 through 2 (of 2 total)

The topic ‘Critical Error When Checking Out’ is closed to new replies.

 * ![](https://s.w.org/plugins/geopattern-icon/cardconnect-payment-module.svg)
 * [CardPointe Payment Gateway for WooCommerce](https://wordpress.org/plugins/cardconnect-payment-module/)
 * [Frequently Asked Questions](https://wordpress.org/plugins/cardconnect-payment-module/#faq)
 * [Support Threads](https://wordpress.org/support/plugin/cardconnect-payment-module/)
 * [Active Topics](https://wordpress.org/support/plugin/cardconnect-payment-module/active/)
 * [Unresolved Topics](https://wordpress.org/support/plugin/cardconnect-payment-module/unresolved/)
 * [Reviews](https://wordpress.org/support/plugin/cardconnect-payment-module/reviews/)

 * 2 replies
 * 3 participants
 * Last reply from: [Liquidpen](https://wordpress.org/support/users/liquidpen/)
 * Last activity: [9 years, 5 months ago](https://wordpress.org/support/topic/critical-error-when-checking-out/#post-8648595)
 * Status: not resolved