Title: Uncaught ReferenceError
Last modified: May 6, 2020

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# Uncaught ReferenceError

 *  Resolved [patrickvokeeffe](https://wordpress.org/support/users/vau6hn/)
 * (@vau6hn)
 * [5 years, 11 months ago](https://wordpress.org/support/topic/uncaught-referenceerror-23/)
 * Hello. I’m seeing this error in my console:
 * ReferenceError: WC_Square_Payment_Form_Handler is not definedcheckout:883:1
    
   <anonymous> [https://staging.seanschuster.com/checkout/:883](https://staging.seanschuster.com/checkout/:883)
   jQuery 4
 * I’ve seen a couple other submissions but didn’t see any particular resolution.
   Just wondering if this is a known issue?
 * The page I need help with: _[[log in](https://login.wordpress.org/?redirect_to=https%3A%2F%2Fwordpress.org%2Fsupport%2Ftopic%2Funcaught-referenceerror-23%2F%3Foutput_format%3Dmd&locale=en_US)
   to see the link]_

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

 *  Plugin Support [slash1andy](https://wordpress.org/support/users/slash1andy/)
 * (@slash1andy)
 * Automattic Happiness Engineer
 * [5 years, 11 months ago](https://wordpress.org/support/topic/uncaught-referenceerror-23/#post-12822030)
 * Hey there!
 * That’s not a known issue, and not typical.
 * We usually see this when there are JS conflicts on the checkout page, normally
   the theme that’s being used, but sometimes other plugins affecting checkout.
 * The best way to determine this is to:
    - 
    - Disable all plugins except for WooCommerce
    - Repeat the action that is causing the problem
 * If you’re not seeing the same problem after completing the conflict test, then
   you know the problem was with the plugins and/or theme you deactivated. To figure
   out which plugin is causing the problem, reactivate your other plugins one by
   one, testing after each, until you find the one causing conflict. You can find
   a more detailed explanation on how to do a conflict test here.
 *  [Elvira K.](https://wordpress.org/support/users/treibalen/)
 * (@treibalen)
 * [5 years, 10 months ago](https://wordpress.org/support/topic/uncaught-referenceerror-23/#post-12869488)
 * Hi there [@vau6hn](https://wordpress.org/support/users/vau6hn/),
 * We haven’t heard back from you in a while, so I’m going to mark this as resolved–
   if you have any further questions, you can start a new thread.
 * Enjoy the rest of your week and stay safe!

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

The topic ‘Uncaught ReferenceError’ is closed to new replies.

 * ![](https://ps.w.org/woocommerce-square/assets/icon-256x256.png?rev=3234354)
 * [WooCommerce Square](https://wordpress.org/plugins/woocommerce-square/)
 * [Frequently Asked Questions](https://wordpress.org/plugins/woocommerce-square/#faq)
 * [Support Threads](https://wordpress.org/support/plugin/woocommerce-square/)
 * [Active Topics](https://wordpress.org/support/plugin/woocommerce-square/active/)
 * [Unresolved Topics](https://wordpress.org/support/plugin/woocommerce-square/unresolved/)
 * [Reviews](https://wordpress.org/support/plugin/woocommerce-square/reviews/)

 * 2 replies
 * 3 participants
 * Last reply from: [Elvira K.](https://wordpress.org/support/users/treibalen/)
 * Last activity: [5 years, 10 months ago](https://wordpress.org/support/topic/uncaught-referenceerror-23/#post-12869488)
 * Status: resolved