Title: [Plugin: WPBook] 404 error – Page tab
Last modified: August 19, 2016

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# [Plugin: WPBook] 404 error – Page tab

 *  [MJ](https://wordpress.org/support/users/mardie/)
 * (@mardie)
 * [15 years, 5 months ago](https://wordpress.org/support/topic/plugin-wpbook-404-error-page-tab/)
 * Hi,
 * I got a problem. When added as a tab, I get:
 * > Application Temporarily Unavailable
   > The URL [http://www.siteurl.com/mytab](http://www.siteurl.com/mytab) returned
   > a 404 Not Found error.
 * I believed it has something to do with the settings in the **Page Tabs**. I am
   not sure what to add in **Tab URL**. If I add a word, this error happens, if 
   I left it blank, more errors appear.
 * Anybody have some ideas?
 * Thanks

Viewing 4 replies - 1 through 4 (of 4 total)

 *  Thread Starter [MJ](https://wordpress.org/support/users/mardie/)
 * (@mardie)
 * [15 years, 5 months ago](https://wordpress.org/support/topic/plugin-wpbook-404-error-page-tab/#post-1787583)
 * But when you go directly to the app’s url, there’s no problem.
 *  Plugin Contributor [B.](https://wordpress.org/support/users/bandonrandon/)
 * (@bandonrandon)
 * [15 years, 5 months ago](https://wordpress.org/support/topic/plugin-wpbook-404-error-page-tab/#post-1787600)
 * Tabs are no longer avaliable for profiles but if you would like a page tab you’ll
   need to set it up in the Facebook settings.
 * You need to add:
    `?app_tab=true&fb_force_mode=fbml`
 * To that setting, which tells WPBook that it is outputting a tab, and will output
   only allowed FBML
 * See [http://wordpress.org/support/topic/tab-feature-not-working](http://wordpress.org/support/topic/tab-feature-not-working)
 *  Thread Starter [MJ](https://wordpress.org/support/users/mardie/)
 * (@mardie)
 * [15 years, 5 months ago](https://wordpress.org/support/topic/plugin-wpbook-404-error-page-tab/#post-1787617)
 * thanks for sharing, it worked.. However, I still see a few errors at the bottom
   saying:
 * > HTML error while rendering tag “img”: Relative URLs not allowed here
 * But anyway at least the 404 error is gone, thanks!
 *  Plugin Contributor [B.](https://wordpress.org/support/users/bandonrandon/)
 * (@bandonrandon)
 * [15 years, 5 months ago](https://wordpress.org/support/topic/plugin-wpbook-404-error-page-tab/#post-1787618)
 * My guess is that error means you are linking to relative site image inside your
   html. Something like `<img src= "../images/my_image.jpg"/>` instead of `<img 
   src ="http"//example.com/images/my_image.jpg"` Check your plugins and see if 
   any are adding images to your footer. IF you’ve modified anything the theme inside/
   theme/index.php check for relative image links there.
 * If you still need help please provide your site URL, app URL, and any plugins
   used.

Viewing 4 replies - 1 through 4 (of 4 total)

The topic ‘[Plugin: WPBook] 404 error – Page tab’ is closed to new replies.

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 * 4 replies
 * 2 participants
 * Last reply from: [B.](https://wordpress.org/support/users/bandonrandon/)
 * Last activity: [15 years, 5 months ago](https://wordpress.org/support/topic/plugin-wpbook-404-error-page-tab/#post-1787618)
 * Status: not resolved