Title: Missing Header
Last modified: August 21, 2016

---

# Missing Header

 *  Resolved [mythusmage](https://wordpress.org/support/users/mythusmage/)
 * (@mythusmage)
 * [12 years, 2 months ago](https://wordpress.org/support/topic/missing-header-4/)
 * That’s all it said.
 * [https://wordpress.org/plugins/jetpack-markdown/](https://wordpress.org/plugins/jetpack-markdown/)

Viewing 6 replies - 1 through 6 (of 6 total)

 *  [Li-An](https://wordpress.org/support/users/li-an/)
 * (@li-an)
 * [12 years, 2 months ago](https://wordpress.org/support/topic/missing-header-4/#post-4674888)
 * Same here.
 *  [404](https://wordpress.org/support/users/ahspw/)
 * (@ahspw)
 * [12 years, 2 months ago](https://wordpress.org/support/topic/missing-header-4/#post-4674945)
 * Do you mean it did not activate at all?
    Or when you try to preview/publish markdown
   formatted content?
 * What is your WordPress version?
 *  [Li-An](https://wordpress.org/support/users/li-an/)
 * (@li-an)
 * [12 years, 2 months ago](https://wordpress.org/support/topic/missing-header-4/#post-4674946)
 * I just did not look if it works after seeing the message. WP 3.8.1 on a test 
   blog – no other plugin and default theme.
 *  [404](https://wordpress.org/support/users/ahspw/)
 * (@ahspw)
 * [12 years, 2 months ago](https://wordpress.org/support/topic/missing-header-4/#post-4674947)
 * Tested using the same configurations (WP 3.8.1, no other plugin, default theme),
   everything is fine!
 * Where does the message appear? I might have missed it!
 *  [Sarah Gooding](https://wordpress.org/support/users/pollyplummer/)
 * (@pollyplummer)
 * [12 years, 2 months ago](https://wordpress.org/support/topic/missing-header-4/#post-4674948)
 * Same issue. See this post for help to fix it: [http://mysillypointofview.richardferaro.com/2010/05/27/fix-the-plugin-does-not-have-a-valid-header-error/](http://mysillypointofview.richardferaro.com/2010/05/27/fix-the-plugin-does-not-have-a-valid-header-error/)
 *  [404](https://wordpress.org/support/users/ahspw/)
 * (@ahspw)
 * [12 years ago](https://wordpress.org/support/topic/missing-header-4/#post-4675000)
 * Fixed!
 * **Problem**:
    Installing Jetpack Markdown using ‘Widgets -> Add New -> Upload’,
   and trying to activate it right from the “Plugin installed successfully” page
   causes a missing/invalid header error. Installing Jetpack Markdown using any 
   method does not cause any errors. Activating Jetpack Markdown from the Plugins
   admin page does not cause any errors.
 * **Cause**:
    WordPress is reading the headers of `jetpack-markdown/markdown/easy-
   markdown.php` instead of (or before) `jetpack-markdown/markdown.php`.
 * **Solution**:
    Make the header section in `easy-markdown.php` invalid to WordPress.
 * **Notes**:
    New downloads will have this issue fixed. I didn’t increment the 
   version number to keep the convention (same version number as the original Jetpack).
 * Thanks you everyone (and [Gunnar Hellekson](https://twitter.com/ghelleks/status/457334401060175872))

Viewing 6 replies - 1 through 6 (of 6 total)

The topic ‘Missing Header’ is closed to new replies.

 * ![](https://s.w.org/plugins/geopattern-icon/jetpack-markdown.svg)
 * [JP Markdown](https://wordpress.org/plugins/jetpack-markdown/)
 * [Support Threads](https://wordpress.org/support/plugin/jetpack-markdown/)
 * [Active Topics](https://wordpress.org/support/plugin/jetpack-markdown/active/)
 * [Unresolved Topics](https://wordpress.org/support/plugin/jetpack-markdown/unresolved/)
 * [Reviews](https://wordpress.org/support/plugin/jetpack-markdown/reviews/)

## Tags

 * [missing](https://wordpress.org/support/topic-tag/missing/)
 * [stuff](https://wordpress.org/support/topic-tag/stuff/)

 * 6 replies
 * 4 participants
 * Last reply from: [404](https://wordpress.org/support/users/ahspw/)
 * Last activity: [12 years ago](https://wordpress.org/support/topic/missing-header-4/#post-4675000)
 * Status: resolved