Title: Header problem
Last modified: February 23, 2021

---

# Header problem

 *  [toys4ushop](https://wordpress.org/support/users/toys4ushop/)
 * (@toys4ushop)
 * [5 years, 2 months ago](https://wordpress.org/support/topic/header-problem-43/)
 * Hello good morning i need help for our website how to fixed this problem
 *     ```
       Warning: Cannot modify header information - headers already sent by (output started at /home/x68913v5qku8/public_html/wp-content/plugins/wordpress-seo/src/integrations/front-end-integration.php:278) in /home/x68913v5qku8/public_html/wp-content/plugins/jwt-authentication-for-wp-rest-api/public/class-jwt-auth-public.php on line 94
   
       Notice: register_rest_route was called incorrectly. The REST API route definition for jwt-auth/v1/token is missing the required permission_callback argument. For REST API routes that are intended to be public, use __return_true as the permission callback. Please see Debugging in WordPress for more information. (This message was added in version 5.5.0.) in /home/x68913v5qku8/public_html/wp-includes/functions.php on line 5311
   
       Notice: register_rest_route was called incorrectly. The REST API route definition for jwt-auth/v1/token/validate is missing the required permission_callback argument. For REST API routes that are intended to be public, use __return_true as the permission callback. Please see Debugging in WordPress for more information. (This message was added in version 5.5.0.) in /home/x68913v5qku8/public_html/wp-includes/functions.php on line 5311
       ```
   
 * thank you so much
 * The page I need help with: _[[log in](https://login.wordpress.org/?redirect_to=https%3A%2F%2Fwordpress.org%2Fsupport%2Ftopic%2Fheader-problem-43%2F%3Foutput_format%3Dmd&locale=en_US)
   to see the link]_

Viewing 1 replies (of 1 total)

 *  Moderator [James Huff](https://wordpress.org/support/users/macmanx/)
 * (@macmanx)
 * [5 years, 2 months ago](https://wordpress.org/support/topic/header-problem-43/#post-14091886)
 * You have unexpected whitespace (either a space or an entire line) on line 278
   of the /wp-content/plugins/wordpress-seo/src/integrations/front-end-integration.
   php file. See [this guide](https://wordpress.org/support/article/faq-troubleshooting/#how-do-i-solve-the-headers-already-sent-warning-problem)
   for more info.
 * Alternatively, replacing the file with one from a fresh download may resolve 
   the issue.

Viewing 1 replies (of 1 total)

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

 * In: [Fixing WordPress](https://wordpress.org/support/forum/how-to-and-troubleshooting/)
 * 1 reply
 * 2 participants
 * Last reply from: [James Huff](https://wordpress.org/support/users/macmanx/)
 * Last activity: [5 years, 2 months ago](https://wordpress.org/support/topic/header-problem-43/#post-14091886)
 * Status: not resolved

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