Title: Receiving Invalid argument errors
Last modified: August 21, 2016

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# Receiving Invalid argument errors

 *  [burakace](https://wordpress.org/support/users/burakace/)
 * (@burakace)
 * [12 years, 8 months ago](https://wordpress.org/support/topic/receiving-invalid-argument-errors/)
 * I have a multisite setup, As soon as I network activate the plugin I receive 
   the following error appearing on top of my word-press dashboard:
 * Warning: Invalid argument supplied for foreach() in /home/content/34/9983534/
   html/institute101/wp-content/plugins/wordpress-seo/inc/wpseo-functions.php on
   line 440
 * When I edit any seo settings and click save, I get redirected to a blank whit
   page with the error:
 * Warning: Cannot modify header information – headers already sent by (output started
   at /home/content/34/9983534/html/institute101/wp-content/plugins/wordpress-seo/
   inc/wpseo-functions.php:440) in /home/content/34/9983534/html/institute101/wp-
   includes/pluggable.php on line 875
 * Please help
 * [http://wordpress.org/plugins/wordpress-seo/](http://wordpress.org/plugins/wordpress-seo/)

The topic ‘Receiving Invalid argument errors’ is closed to new replies.

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 * 0 replies
 * 1 participant
 * Last reply from: [burakace](https://wordpress.org/support/users/burakace/)
 * Last activity: [12 years, 8 months ago](https://wordpress.org/support/topic/receiving-invalid-argument-errors/)
 * Status: not resolved