Title: [Plugin: WP Mobile Detector] Error After Activation
Last modified: August 19, 2016

---

# [Plugin: WP Mobile Detector] Error After Activation

 *  [Mike](https://wordpress.org/support/users/marketmike/)
 * (@marketmike)
 * [15 years, 6 months ago](https://wordpress.org/support/topic/plugin-wp-mobile-detector-error-after-activation/)
 * Getting this error on WordPress 3.01 after activation: The plugin generated 3426
   characters of unexpected output during activation. If you notice “headers already
   sent” messages, problems with syndication feeds or other issues, try deactivating
   or removing this plugin.
 * [http://wordpress.org/extend/plugins/wp-mobile-detector/](http://wordpress.org/extend/plugins/wp-mobile-detector/)

Viewing 3 replies - 1 through 3 (of 3 total)

 *  Plugin Author [websitezcom](https://wordpress.org/support/users/websitezcom/)
 * (@websitezcom)
 * [15 years, 6 months ago](https://wordpress.org/support/topic/plugin-wp-mobile-detector-error-after-activation/#post-1799373)
 * Thanks Mike for the feedback.
 * Can you send a screenshot to [info@websitez.com](https://wordpress.org/support/topic/plugin-wp-mobile-detector-error-after-activation/info@websitez.com?output_format=md)
   if you’d be so kind?
 * That way I can troubleshoot the issue.
 * Thanks.
 *  [indu wp](https://wordpress.org/support/users/indu-wp/)
 * (@indu-wp)
 * [14 years, 9 months ago](https://wordpress.org/support/topic/plugin-wp-mobile-detector-error-after-activation/#post-1799794)
 * The requested URL could not be retrieved
    While trying to process the request:
 * POST /api/websitez-wp-mobile-detector/offers.php HTTP/1.1
    Host: websitez.com
   Accept: */* Content-Length: 0 Content-Type: application/x-www-form-urlencoded
 * The following error was encountered while trying to edit the mobile detector 
   options
 * Invalid Request
    Some aspect of the HTTP Request is invalid. Possible problems:
 * Missing or unknown request method
    Missing URL Missing HTTP Identifier (HTTP/
   1.0) Request is too large Content-Length missing for POST or PUT requests Illegal
   character in hostname; underscores are not allowed Your cache administrator is
   root
 *  Plugin Author [websitezcom](https://wordpress.org/support/users/websitezcom/)
 * (@websitezcom)
 * [14 years, 8 months ago](https://wordpress.org/support/topic/plugin-wp-mobile-detector-error-after-activation/#post-1799795)
 * Which page generated these errors? Were these from a log?

Viewing 3 replies - 1 through 3 (of 3 total)

The topic ‘[Plugin: WP Mobile Detector] Error After Activation’ is closed to new
replies.

 * ![](https://s.w.org/plugins/geopattern-icon/wp-mobile-detector_899b74.svg)
 * [WP Mobile Detector](https://wordpress.org/plugins/wp-mobile-detector/)
 * [Frequently Asked Questions](https://wordpress.org/plugins/wp-mobile-detector/#faq)
 * [Support Threads](https://wordpress.org/support/plugin/wp-mobile-detector/)
 * [Active Topics](https://wordpress.org/support/plugin/wp-mobile-detector/active/)
 * [Unresolved Topics](https://wordpress.org/support/plugin/wp-mobile-detector/unresolved/)
 * [Reviews](https://wordpress.org/support/plugin/wp-mobile-detector/reviews/)

 * 3 replies
 * 3 participants
 * Last reply from: [websitezcom](https://wordpress.org/support/users/websitezcom/)
 * Last activity: [14 years, 8 months ago](https://wordpress.org/support/topic/plugin-wp-mobile-detector-error-after-activation/#post-1799795)
 * Status: not resolved