Title: Errors on backend
Last modified: January 3, 2017

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# Errors on backend

 *  [thepixelsedge](https://wordpress.org/support/users/thepixelsedge/)
 * (@thepixelsedge)
 * [9 years, 5 months ago](https://wordpress.org/support/topic/errors-on-backend/)
 * Hi there, I’ve recently installed your plugin but I’m getting the following errors
   on the backend of my site after deactivating all other plugins.
 * ERRORS:
    Warning: call_user_func() expects parameter 1 to be a valid callback,
   class ‘RWMB_Simple_Proportions_Field’ does not have a method ‘add_actions’ in/
   home/content/p3pnexwpnas01_data01/23/3631223/html/wp-content/plugins/wp-property/
   vendor/plugins/wp-meta-box/inc/meta-box.php on line 80
 * Warning: call_user_func() expects parameter 1 to be a valid callback, class ‘
   RWMB_Simple_Proportions_Field’ does not have a method ‘add_actions’ in /home/
   content/p3pnexwpnas01_data01/23/3631223/html/wp-content/plugins/wp-property/vendor/
   plugins/wp-meta-box/inc/meta-box.php on line 80
 * Warning: call_user_func() expects parameter 1 to be a valid callback, class ‘
   RWMB_Fancy_Category_Field’ does not have a method ‘normalize_field’ in /home/
   content/p3pnexwpnas01_data01/23/3631223/html/wp-content/plugins/wp-property/vendor/
   plugins/wp-meta-box/inc/meta-box.php on line 412
 * Warning: call_user_func() expects parameter 1 to be a valid callback, first array
   member is not a valid class name or object in /home/content/p3pnexwpnas01_data01/
   23/3631223/html/wp-content/plugins/wp-property/vendor/plugins/wp-meta-box/inc/
   meta-box.php on line 80
 * Warning: call_user_func() expects parameter 1 to be a valid callback, class ‘
   RWMB_Simple_Proportions_Field’ does not have a method ‘add_actions’ in /home/
   content/p3pnexwpnas01_data01/23/3631223/html/wp-content/plugins/wp-property/vendor/
   plugins/wp-meta-box/inc/meta-box.php on line 80
 * Warning: call_user_func() expects parameter 1 to be a valid callback, class ‘
   RWMB_Dropdown_Pages_Field’ does not have a method ‘add_actions’ in /home/content/
   p3pnexwpnas01_data01/23/3631223/html/wp-content/plugins/wp-property/vendor/plugins/
   wp-meta-box/inc/meta-box.php on line 80

Viewing 1 replies (of 1 total)

 *  [Elena](https://wordpress.org/support/users/lena60942/)
 * (@lena60942)
 * [9 years, 5 months ago](https://wordpress.org/support/topic/errors-on-backend/#post-8622272)
 * Hello,
 * Could you please e-mail me the details of the following:
 * * Versions of all the products.
    * When does this error appear. * What are you
   trying to do when it appears.
 * Usabilitydynamics.com/contact-us
 * Will be waiting for your reply 🙂

Viewing 1 replies (of 1 total)

The topic ‘Errors on backend’ is closed to new replies.

 * ![](https://s.w.org/plugins/geopattern-icon/wp-property_c36510.svg)
 * [WP-Property - WordPress Powered Real Estate and Property Management](https://wordpress.org/plugins/wp-property/)
 * [Frequently Asked Questions](https://wordpress.org/plugins/wp-property/#faq)
 * [Support Threads](https://wordpress.org/support/plugin/wp-property/)
 * [Active Topics](https://wordpress.org/support/plugin/wp-property/active/)
 * [Unresolved Topics](https://wordpress.org/support/plugin/wp-property/unresolved/)
 * [Reviews](https://wordpress.org/support/plugin/wp-property/reviews/)

 * 1 reply
 * 2 participants
 * Last reply from: [Elena](https://wordpress.org/support/users/lena60942/)
 * Last activity: [9 years, 5 months ago](https://wordpress.org/support/topic/errors-on-backend/#post-8622272)
 * Status: not resolved