Title: HTTP ERROR 500
Last modified: May 2, 2019

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# HTTP ERROR 500

 *  Resolved [jeroenconvens](https://wordpress.org/support/users/jeroenconvens/)
 * (@jeroenconvens)
 * [7 years, 1 month ago](https://wordpress.org/support/topic/http-error-500-164/)
 * CRITICAL Uncaught Error: Undefined class constant ‘PRZELEWY24’
 * This error causes the checkout and account pages to no longer work. even the 
   settings of woocommerce can no longer be consulted.

Viewing 3 replies - 1 through 3 (of 3 total)

 *  Plugin Contributor [davdebcom](https://wordpress.org/support/users/davdebcom/)
 * (@davdebcom)
 * [7 years, 1 month ago](https://wordpress.org/support/topic/http-error-500-164/#post-11489483)
 * You are also using another plugin with Mollie, correct? And that one didn’t update
   it’s Mollie API PHP in the last month, that is causing this issue.
 *  Thread Starter [jeroenconvens](https://wordpress.org/support/users/jeroenconvens/)
 * (@jeroenconvens)
 * [7 years, 1 month ago](https://wordpress.org/support/topic/http-error-500-164/#post-11489518)
 * Yes, we are also using the Give – Mollie Gateway.
 * Indeed if we deactivate Give – Mollie Gateway it works.
 * But we need both to work…
 *  Plugin Contributor [davdebcom](https://wordpress.org/support/users/davdebcom/)
 * (@davdebcom)
 * [7 years, 1 month ago](https://wordpress.org/support/topic/http-error-500-164/#post-11489709)
 * You can ask Give to also update the Mollie PHP API in that plugin or downgrade
   the Mollie plugin to a previous version until Give has updated.

Viewing 3 replies - 1 through 3 (of 3 total)

The topic ‘HTTP ERROR 500’ is closed to new replies.

 * ![](https://ps.w.org/mollie-payments-for-woocommerce/assets/icon-256x256.png?
   rev=3090580)
 * [Mollie Payments for WooCommerce](https://wordpress.org/plugins/mollie-payments-for-woocommerce/)
 * [Frequently Asked Questions](https://wordpress.org/plugins/mollie-payments-for-woocommerce/#faq)
 * [Support Threads](https://wordpress.org/support/plugin/mollie-payments-for-woocommerce/)
 * [Active Topics](https://wordpress.org/support/plugin/mollie-payments-for-woocommerce/active/)
 * [Unresolved Topics](https://wordpress.org/support/plugin/mollie-payments-for-woocommerce/unresolved/)
 * [Reviews](https://wordpress.org/support/plugin/mollie-payments-for-woocommerce/reviews/)

 * 3 replies
 * 2 participants
 * Last reply from: [davdebcom](https://wordpress.org/support/users/davdebcom/)
 * Last activity: [7 years, 1 month ago](https://wordpress.org/support/topic/http-error-500-164/#post-11489709)
 * Status: resolved