Title: Header errors
Last modified: April 27, 2020

---

# Header errors

 *  Resolved [Carsten Lund](https://wordpress.org/support/users/carsten-lund/)
 * (@carsten-lund)
 * [6 years, 1 month ago](https://wordpress.org/support/topic/header-errors-8/)
 * Hi there, activating the Flexi plugin generated som header errors with debug 
   true, apparently there is also a conflict with the plugin WiseChat. I don’t know
   if these errors mean anything, but here they are:
 * > The plugin generated 187 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.
 *     ```
       Deprecated: define(): Declaration of case-insensitive constants is deprecated in /home/domain/public_html/wp-content/plugins/flexi/flexi.php on line 50
   
       Warning: session_start(): Cannot start session when headers already sent in /home/domain/public_html/wp-content/plugins/wise-chat/src/dao/user/WiseChatUserSessionDAO.php on line 95
   
       Notice: Undefined variable: _SESSION in /home/domain/public_html/wp-content/plugins/wise-chat/src/dao/user/WiseChatUserSessionDAO.php on line 62
   
       Notice: Undefined variable: _SESSION in /home/domain/public_html/wp-content/plugins/wise-chat/src/dao/user/WiseChatUserSessionDAO.php on line 62
   
       Warning: Cannot modify header information – headers already sent by (output started at /home/domain/public_html/wp-content/plugins/flexi/flexi.php:50) in /home/domain/public_html/wp-includes/functions.php on line 6221
   
       Warning: Cannot modify header information – headers already sent by (output started at /home/domain/public_html/wp-content/plugins/flexi/flexi.php:50) in /home/domain/public_html/wp-admin/includes/misc.php on line 1259
   
       Warning: Cannot modify header information – headers already sent by (output started at /home/domain/public_html/wp-content/plugins/flexi/flexi.php:50) in /home/domain/public_html/wp-admin/admin-header.php on line 9
       ```
   
 * Regards
    Carsten

Viewing 9 replies - 1 through 9 (of 9 total)

 *  Plugin Author [odude](https://wordpress.org/support/users/odude/)
 * (@odude)
 * [6 years, 1 month ago](https://wordpress.org/support/topic/header-errors-8/#post-12738225)
 * Can you please uninstall and install again, The log you send me didn’t help me
   to find the exact file location creating a issue.
 * I also installed wise-chat but no issue at my end.
 *  Thread Starter [Carsten Lund](https://wordpress.org/support/users/carsten-lund/)
 * (@carsten-lund)
 * [6 years, 1 month ago](https://wordpress.org/support/topic/header-errors-8/#post-12738299)
 * Hi there, I tried debugging again, now with no issues, so it must have been temporary,
   sorry about that.
 * Anyway, thanks for your effort in solving this issue.
 *  Thread Starter [Carsten Lund](https://wordpress.org/support/users/carsten-lund/)
 * (@carsten-lund)
 * [6 years, 1 month ago](https://wordpress.org/support/topic/header-errors-8/#post-12738341)
 * Ohh, hold on, Flexi was deactivated, issue is still there, I will try deinstall
   and reinstall
 *  Plugin Author [odude](https://wordpress.org/support/users/odude/)
 * (@odude)
 * [6 years, 1 month ago](https://wordpress.org/support/topic/header-errors-8/#post-12738356)
 * It’s very important for me to find the exact issue, as I don’t see error at my
   end and few more people complains about it.
    Please debug
 *  Thread Starter [Carsten Lund](https://wordpress.org/support/users/carsten-lund/)
 * (@carsten-lund)
 * [6 years, 1 month ago](https://wordpress.org/support/topic/header-errors-8/#post-12738444)
 * First, the activation did not succeed, then a message:
 * This plugin does not have a header.
 * After successful reinstall, apparently the issue has gone. I will get back to
   you, if I experience it again. Please let me know, if there is something I can
   do.
 *  Plugin Author [odude](https://wordpress.org/support/users/odude/)
 * (@odude)
 * [6 years, 1 month ago](https://wordpress.org/support/topic/header-errors-8/#post-12738452)
 * copy paste me the header error, filename, line number anything you receive.
    
   Exactly when happened. This all will be enough for me. Thank you Navneet
 *  Thread Starter [Carsten Lund](https://wordpress.org/support/users/carsten-lund/)
 * (@carsten-lund)
 * [6 years, 1 month ago](https://wordpress.org/support/topic/header-errors-8/#post-12743705)
 * Hi, thanks for the update, i still receive some errors.
 * I get these errors when I use this shortcode in my element [flexi-user-dashboard]
 *     ```
       Notice: Trying to get property 'ID' of non-object in /home/domain/public_html/wp-content/plugins/flexi/includes/functions.php on line 21
   
       Notice: Trying to get property 'user_email' of non-object in /home/domain/public_html/wp-content/plugins/flexi/includes/functions.php on line 31
   
       Notice: Trying to get property 'display_name' of non-object in /home/domain/public_html/wp-content/plugins/flexi/includes/functions.php on line 31
   
       Notice: Trying to get property 'first_name' of non-object in /home/domain/public_html/wp-content/plugins/flexi/includes/functions.php on line 33
   
       Notice: Trying to get property 'last_name' of non-object in /home/domain/public_html/wp-content/plugins/flexi/includes/functions.php on line 33
   
       Notice: Trying to get property 'user_login' of non-object in /home/domain/public_html/wp-content/plugins/flexi/includes/functions.php on line 33
       ```
   
 * There are some installation issues, upload fails the first time
 * > An error occurred while updating Flexi Gallery: Download failed. cURL error
   > 28: Connection timed out after 10000 milliseconds
 * > Warning: An unexpected error occurred. Something may be wrong with WordPress.
   > org or this server’s configuration. If you continue to have problems, please
   > try the support forums. (WordPress could not establish a secure connection 
   > to WordPress.org. Please contact your server administrator.) in /home/domain/
   > public_html/wp-admin/includes/plugin-install.php on line 182
 *  Plugin Author [odude](https://wordpress.org/support/users/odude/)
 * (@odude)
 * [6 years, 1 month ago](https://wordpress.org/support/topic/header-errors-8/#post-12744402)
 * I again updated, the plugin.
    Have a look and inform me back. Or mail me personally
   at [navneet@odude.com](https://wordpress.org/support/topic/header-errors-8/navneet@odude.com?output_format=md)
   I would love to interact with you.
 *  Thread Starter [Carsten Lund](https://wordpress.org/support/users/carsten-lund/)
 * (@carsten-lund)
 * [6 years, 1 month ago](https://wordpress.org/support/topic/header-errors-8/#post-12744434)
 * I have Version 1.0.17 installed, did you update again?
    In that case it is not
   in the plugin updater

Viewing 9 replies - 1 through 9 (of 9 total)

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

 * ![](https://s.w.org/plugins/geopattern-icon/flexi_73695a.svg)
 * [Flexi - Guest Submit](https://wordpress.org/plugins/flexi/)
 * [Frequently Asked Questions](https://wordpress.org/plugins/flexi/#faq)
 * [Support Threads](https://wordpress.org/support/plugin/flexi/)
 * [Active Topics](https://wordpress.org/support/plugin/flexi/active/)
 * [Unresolved Topics](https://wordpress.org/support/plugin/flexi/unresolved/)
 * [Reviews](https://wordpress.org/support/plugin/flexi/reviews/)

 * 9 replies
 * 2 participants
 * Last reply from: [Carsten Lund](https://wordpress.org/support/users/carsten-lund/)
 * Last activity: [6 years, 1 month ago](https://wordpress.org/support/topic/header-errors-8/#post-12744434)
 * Status: resolved