Title: Missing Argument / Undefined Variable / Cannot Modify Header
Last modified: July 14, 2017

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# Missing Argument / Undefined Variable / Cannot Modify Header

 *  Resolved [clevercookiedes](https://wordpress.org/support/users/clevercookiedes/)
 * (@clevercookiedes)
 * [8 years, 11 months ago](https://wordpress.org/support/topic/missing-argument-undefined-variable-cannot-modify-header/)
 * Clean install of WP throwing a couple of errors when viewing monitors from with
   WP admin:
 *     ```
       Warning: Missing argument 2 for wp_register_script(), called in /home/***user-directory***/public_html/www/wp-content/plugins/uptime-robot-monitor/uptime-robot-nh.php on line 88 and defined in /home/***user-directory***/public_html/www/wp-includes/functions.wp-scripts.php on line 145
   
       Notice: Undefined variable: src in /home/***user-directory***/public_html/www/wp-includes/functions.wp-scripts.php on line 149
       ```
   
 * Also throwing an error when trying to save settings from within WP admin
 * `Warning: Cannot modify header information - headers already sent by (output 
   started at /home/***user-directory***/public_html/www/wp-includes/script-loader.
   php:1403) in /home/***user-directory***/public_html/www/wp-includes/pluggable.
   php on line 1210`

Viewing 1 replies (of 1 total)

 *  Plugin Author [Aphotrax](https://wordpress.org/support/users/vlijmen/)
 * (@vlijmen)
 * [8 years, 9 months ago](https://wordpress.org/support/topic/missing-argument-undefined-variable-cannot-modify-header/#post-9436896)
 * Hi,
 * My apologies for the late reply to your issue. With the update to v2.2 from today
   this should be resolved.
 * With kind regards,
    Niels

Viewing 1 replies (of 1 total)

The topic ‘Missing Argument / Undefined Variable / Cannot Modify Header’ is closed
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## Tags

 * [PHP7](https://wordpress.org/support/topic-tag/php7/)

 * 1 reply
 * 2 participants
 * Last reply from: [Aphotrax](https://wordpress.org/support/users/vlijmen/)
 * Last activity: [8 years, 9 months ago](https://wordpress.org/support/topic/missing-argument-undefined-variable-cannot-modify-header/#post-9436896)
 * Status: resolved