Title: call_user_func_array problem with Vendor Woocommerce Plugin
Last modified: August 12, 2020

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# call_user_func_array problem with Vendor Woocommerce Plugin

 *  Resolved [ismaeltraba](https://wordpress.org/support/users/ismaeltraba/)
 * (@ismaeltraba)
 * [5 years, 9 months ago](https://wordpress.org/support/topic/call_user_func_array-problem-with-vendor-woocommerce-plugin/)
 * Hello!
 * Please I need some help about a special topic. The WordPress warning is exactly
   this:
 * **call_user_func_array() expects parameter 1 to be a valid callback, class ‘Class-
   >WC_Product_Vendors_Vendor_Frontend’ not found in (…) class-wp-hook.php on line
   287**
 * I have touch nothing in my code in reference to the plugin and functions.php.
   I saw the problem when needed some special fields in vendor’s template and try
   to do it with ACF. The vendor was not assigned products and the result was “no
   products found” and all the ACF fields were in their own space. Since here it
   was all right.
    My next step was to assign some products to the vendor and crash!
   All the fields were dissapeared. I could not believe it! The web was thinked 
   to be a marketplace and if woocommerce vendor doesn’t work with the special fields
   I could have some new problems.
 * I hope it’s easy to solve.
    Greatfull so much about your answers.
 * The page I need help with: _[[log in](https://login.wordpress.org/?redirect_to=https%3A%2F%2Fwordpress.org%2Fsupport%2Ftopic%2Fcall_user_func_array-problem-with-vendor-woocommerce-plugin%2F%3Foutput_format%3Dmd&locale=en_US)
   to see the link]_

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

 *  Plugin Support [Thu P. a11n](https://wordpress.org/support/users/thup90/)
 * (@thup90)
 * [5 years, 9 months ago](https://wordpress.org/support/topic/call_user_func_array-problem-with-vendor-woocommerce-plugin/#post-13247543)
 * Hi there,
 * It sounds like the error comes from adding the custom fields and linking them
   to Product Vendors with the ACF plugin. I’d recommend reviewing your code and
   setup to make sure the plugins are integrated properly.
 * If you need to hire a dev to review it for you and see where it’s gone wrong,
   I’d recommend reaching out to someone on our customizations page [https://woocommerce.com/customizations/](https://woocommerce.com/customizations/)
 * I can also recommend the following places for more development-oriented questions:
    1. WooCommerce Slack Community: [https://woocommerce.com/community-slack/](https://woocommerce.com/community-slack/)
    2. WooCommerce FB group: [https://www.facebook.com/groups/advanced.woocommerce/](https://www.facebook.com/groups/advanced.woocommerce/)
 *  Thread Starter [ismaeltraba](https://wordpress.org/support/users/ismaeltraba/)
 * (@ismaeltraba)
 * [5 years, 9 months ago](https://wordpress.org/support/topic/call_user_func_array-problem-with-vendor-woocommerce-plugin/#post-13253361)
 * Hi,
    I will question for it.
 * Thank you so much [@thup90](https://wordpress.org/support/users/thup90/) !

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

The topic ‘call_user_func_array problem with Vendor Woocommerce Plugin’ is closed
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## Tags

 * [call_user_func_array](https://wordpress.org/support/topic-tag/call_user_func_array/)
 * [class-wp-hook.php](https://wordpress.org/support/topic-tag/class-wp-hook-php/)
 * [marketplace](https://wordpress.org/support/topic-tag/marketplace/)
 * [woocommerce vendor](https://wordpress.org/support/topic-tag/woocommerce-vendor/)
 * [wordpress warning](https://wordpress.org/support/topic-tag/wordpress-warning/)

 * 2 replies
 * 2 participants
 * Last reply from: [ismaeltraba](https://wordpress.org/support/users/ismaeltraba/)
 * Last activity: [5 years, 9 months ago](https://wordpress.org/support/topic/call_user_func_array-problem-with-vendor-woocommerce-plugin/#post-13253361)
 * Status: resolved