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> Displaying 500 errors in PrestaShop

If you do not have access to the error logs of your server, you can display the error on the redirection page by doing the following:

  1. Disable the Instant Payment Notification URL in the Merchant Back Office.

    Reminder: to disable the IPN, go to Settings > Notification rules > Right-click on Instant Payment Notification URL at the end of payment > Disable the rule.

  2. Display the errors by activating the DEV mode for your PrestaShop store. To do so, in the defines.inc.php file located in the config folder, replace:

    define('_PS_MODE_DEV_', false);

    With: define('_PS_MODE_DEV_', true);

  3. Make a test payment and click on the return to shop button, your error should appear on the screen.
  4. Once the error appears, do not forget to disable the DEV mode for your PrestaShop store and to re-enable the Instant Payment Notification URL.