Title: Errro when installing plugin
Last modified: September 18, 2019

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# Errro when installing plugin

 *  Resolved [manaka02](https://wordpress.org/support/users/manaka02/)
 * (@manaka02)
 * [6 years, 8 months ago](https://wordpress.org/support/topic/errro-when-installing-plugin/)
 * Hello, I got this message in log when I want to install this plugin
    `PHP Warning:
   call_user_func_array() expects parameter 1 to be a valid callback, function '
   TransferOutBeforeUpgrade' not found or invalid function name in /home/admin/web/
   myWebsite.mg/public_html/wp-includes/class-wp-hook.php on line 286`
    -  This topic was modified 6 years, 8 months ago by [manaka02](https://wordpress.org/support/users/manaka02/).

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

 *  Plugin Author [ethereumicoio](https://wordpress.org/support/users/ethereumicoio/)
 * (@ethereumicoio)
 * [6 years, 8 months ago](https://wordpress.org/support/topic/errro-when-installing-plugin/#post-11954895)
 * Hello [@manaka02](https://wordpress.org/support/users/manaka02/),
    Thank you 
   for your report! The function named TransferOutBeforeUpgrade is not used or defined
   in this plugin. Try to deactivate all other plugins (except WooCommerce) and 
   test again please.
 *  Plugin Author [ethereumicoio](https://wordpress.org/support/users/ethereumicoio/)
 * (@ethereumicoio)
 * [6 years, 8 months ago](https://wordpress.org/support/topic/errro-when-installing-plugin/#post-12025098)
 * Feel free to contact me if problem still persists.

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

The topic ‘Errro when installing plugin’ is closed to new replies.

 * ![](https://ps.w.org/cryptocurrency-product-for-woocommerce/assets/icon-256x256.
   png?rev=2149134)
 * [Cryptocurrency Product for WooCommerce](https://wordpress.org/plugins/cryptocurrency-product-for-woocommerce/)
 * [Frequently Asked Questions](https://wordpress.org/plugins/cryptocurrency-product-for-woocommerce/#faq)
 * [Support Threads](https://wordpress.org/support/plugin/cryptocurrency-product-for-woocommerce/)
 * [Active Topics](https://wordpress.org/support/plugin/cryptocurrency-product-for-woocommerce/active/)
 * [Unresolved Topics](https://wordpress.org/support/plugin/cryptocurrency-product-for-woocommerce/unresolved/)
 * [Reviews](https://wordpress.org/support/plugin/cryptocurrency-product-for-woocommerce/reviews/)

 * 2 replies
 * 2 participants
 * Last reply from: [ethereumicoio](https://wordpress.org/support/users/ethereumicoio/)
 * Last activity: [6 years, 8 months ago](https://wordpress.org/support/topic/errro-when-installing-plugin/#post-12025098)
 * Status: resolved