Title: Coen Zuijderwijk's Replies | WordPress.org

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# Coen Zuijderwijk

  [  ](https://wordpress.org/support/users/coenz/)

 *   [Profile](https://wordpress.org/support/users/coenz/)
 *   [Topics Started](https://wordpress.org/support/users/coenz/topics/)
 *   [Replies Created](https://wordpress.org/support/users/coenz/replies/)
 *   [Reviews Written](https://wordpress.org/support/users/coenz/reviews/)
 *   [Topics Replied To](https://wordpress.org/support/users/coenz/replied-to/)
 *   [Engagements](https://wordpress.org/support/users/coenz/engagements/)
 *   [Favorites](https://wordpress.org/support/users/coenz/favorites/)

 Search replies:

## Forum Replies Created

Viewing 6 replies - 1 through 6 (of 6 total)

 *   Forum: [Plugins](https://wordpress.org/support/forum/plugins-and-hacks/)
    In
   reply to: [[WooCommerce] Coupons emailing twice](https://wordpress.org/support/topic/coupons-emailing-twice/)
 *  Thread Starter [Coen Zuijderwijk](https://wordpress.org/support/users/coenz/)
 * (@coenz)
 * [1 year, 9 months ago](https://wordpress.org/support/topic/coupons-emailing-twice/#post-18189068)
 * Hey Zubair,
   I overlooked the plugins list and it turned out i used a plugin to
   create the coupons. This plugin had an add-on to split up the coupons in individual
   products. It doesnt solve the problem if a coupon has a quantity of 2 or higher.
   But i addressed this at the plugin devs.
 *   Forum: [Plugins](https://wordpress.org/support/forum/plugins-and-hacks/)
    In
   reply to: [[WooCommerce] Coupons emailing twice](https://wordpress.org/support/topic/coupons-emailing-twice/)
 *  Thread Starter [Coen Zuijderwijk](https://wordpress.org/support/users/coenz/)
 * (@coenz)
 * [1 year, 9 months ago](https://wordpress.org/support/topic/coupons-emailing-twice/#post-18186440)
 * Hey Zubair,
   I marked this ticket as resolved, because i overlooked a plugin we
   use for the coupons. This plugin was causing the problems.Thank you for your 
   response!
 *   Forum: [Plugins](https://wordpress.org/support/forum/plugins-and-hacks/)
    In
   reply to: [[Max Mega Menu] Conflict between Mega menu and MultilingualPress](https://wordpress.org/support/topic/conflict-between-mega-menu-and-multilingualpress/)
 *  Thread Starter [Coen Zuijderwijk](https://wordpress.org/support/users/coenz/)
 * (@coenz)
 * [1 year, 11 months ago](https://wordpress.org/support/topic/conflict-between-mega-menu-and-multilingualpress/#post-18085399)
 * Hey Tom,
 * Thank you for your response! We are indeed using the [pro version](https://multilingualpress.org/).
   Since this version gets updated, changing the code directly wouldn’t be effective.
 * I tried adding the code to a mu-plugin, but this didn’t solve the problem. I 
   also attempted to modify the code directly, but the thread is 7 years old, and
   the folder structure has changed, so this wasn’t possible either.
 *   Forum: [Plugins](https://wordpress.org/support/forum/plugins-and-hacks/)
    In
   reply to: [[Max Mega Menu] Conflict between Mega menu and MultilingualPress](https://wordpress.org/support/topic/conflict-between-mega-menu-and-multilingualpress/)
 *  Thread Starter [Coen Zuijderwijk](https://wordpress.org/support/users/coenz/)
 * (@coenz)
 * [1 year, 11 months ago](https://wordpress.org/support/topic/conflict-between-mega-menu-and-multilingualpress/#post-18081274)
 * Hey Tom,
   The error that is thrown is as following:[18-Oct-2024 10:05:39 UTC] 
   PHP **Fatal** **error:** Uncaught TypeError: Inpsyde\MultilingualPress\Cache\
   NavMenuItemsSerializer::fromWpPostItems(): Argument #6 must be of type WP_Post,
   stdClass given, called in /public/wp-content/plugins/multilingualpress/src/multilingualpress/
   NavMenu/ItemFilter.php on line 250 and defined in /public/wp-content/plugins/
   multilingualpress/src/multilingualpress/Cache/NavMenuItemsSerializer.php:63We
   do indeed use the plugin you send. Is there a chance you can look into it?
 *   Forum: [Plugins](https://wordpress.org/support/forum/plugins-and-hacks/)
    In
   reply to: [[Max Mega Menu] Hiding menu bug](https://wordpress.org/support/topic/hiding-menu-bug/)
 *  Thread Starter [Coen Zuijderwijk](https://wordpress.org/support/users/coenz/)
 * (@coenz)
 * [2 years ago](https://wordpress.org/support/topic/hiding-menu-bug/#post-18035823)
 * Hey Tom,
   Thanks for your swift reply! This worked for the site i added. Sadly
   this didnt solve the problem for the first website i showed: [https://mozaiektegelwinkel.kinsta.cloud/](https://mozaiektegelwinkel.kinsta.cloud/)
   Could you maybe take a look here as well?
 *   Forum: [Plugins](https://wordpress.org/support/forum/plugins-and-hacks/)
    In
   reply to: [[Boxzilla - WordPress Popup Builder] Boxzilla is not defined](https://wordpress.org/support/topic/boxzilla-is-not-defined/)
 *  Thread Starter [Coen Zuijderwijk](https://wordpress.org/support/users/coenz/)
 * (@coenz)
 * [2 years, 1 month ago](https://wordpress.org/support/topic/boxzilla-is-not-defined/#post-17933887)
 * I have found the solution. We are using WPRocket and Perfmatters to manage deffering
   js and etc. This caused the error.

Viewing 6 replies - 1 through 6 (of 6 total)