Title: Header Error in WP Last modified: December 19, 2020 --- # Header Error in WP * Resolved [dave-kinnear](https://wordpress.org/support/users/dave-kinnear/) * (@dave-kinnear) * [5 years, 5 months ago](https://wordpress.org/support/topic/header-error-in-wp/) * After the last update to WP, I began getting the following error: * Warning: Cannot modify header information – headers already sent by (output started at /home/customer/www/execleadercoach.com/public_html/wp-content/plugins/wp-post- nav/admin/partials/wp-post-nav-admin-instructions.php:13) in /home/customer/www/ execleadercoach.com/public_html/wp-admin/includes/misc.php on line 1310 * This error only shows up in the WP workspace, doesn’t show up on the live website, and doesn’t prevent the WP Nav plugin from working on the live site. * Anyone else experiencing this issue? Viewing 13 replies - 1 through 13 (of 13 total) * Plugin Author [Jo4nny8](https://wordpress.org/support/users/jo4nny8/) * (@jo4nny8) * [5 years, 5 months ago](https://wordpress.org/support/topic/header-error-in-wp/#post-13812170) * [@dave-kinnear](https://wordpress.org/support/users/dave-kinnear/) * Can you provide an email address so I can send you a modified instructions file to see if that fixes the error. * Please advise if you are able to manually edit / replace files or I can send a complete plugin for you to upload to your wp-admin * Thread Starter [dave-kinnear](https://wordpress.org/support/users/dave-kinnear/) * (@dave-kinnear) * [5 years, 5 months ago](https://wordpress.org/support/topic/header-error-in-wp/#post-13812262) * [@jo4nny8](https://wordpress.org/support/users/jo4nny8/), * Thanks for your quick response. I probably can figure out how to edit or replace files, but I generally don’t get too deep into the WP theme. I am using the PRO theme for this site ([https://execleadercoach.com](https://execleadercoach.com)). Obviously, it would be easier for me to uninstall the existing plugin and reinstall your modified plugin. * email is [dave@execleadercoach.com](https://wordpress.org/support/topic/header-error-in-wp/dave@execleadercoach.com?output_format=md). * Dave Kinnear * Plugin Author [Jo4nny8](https://wordpress.org/support/users/jo4nny8/) * (@jo4nny8) * [5 years, 5 months ago](https://wordpress.org/support/topic/header-error-in-wp/#post-13812278) * [@dave-kinnear](https://wordpress.org/support/users/dave-kinnear/) * Ive just sent you a modified version. Please advise if this fixes the error and I will make the modification and upload it to the plugin repository * You MUST unzip and upload the folder contents to the wordpress ‘plugins’ folder so it overwrites the current plugin if you have made modifications inside wp= admin to the plugin (changed colours, font sizes etc) (the plugin deletes its options on deletion which is the only way you can overwrite the current version) * If you haven’t made any changes, then you can delete the current version and upload this one inside the plugins section of wordpress * John * Thread Starter [dave-kinnear](https://wordpress.org/support/users/dave-kinnear/) * (@dave-kinnear) * [5 years, 5 months ago](https://wordpress.org/support/topic/header-error-in-wp/#post-13812933) * Hi John, Thanks so much for your help. * Since I made no changes (other than checkbox selections), I deleted the previous version and installed the new version the way I normally would. Your zip file installed perfectly. * However, it did not fix the error message. 😐 Is there a way I can help you more? Are you familiar with the PRO template? Maybe it’s the problem? * Dave K. * Plugin Author [Jo4nny8](https://wordpress.org/support/users/jo4nny8/) * (@jo4nny8) * [5 years, 5 months ago](https://wordpress.org/support/topic/header-error-in-wp/#post-13813948) * [@dave-kinnear](https://wordpress.org/support/users/dave-kinnear/) Im not familiar with the PRO theme, however ive just sent another modified version if you can check if this works. * Failing that ill rewrite the function for fetching the instruction page. * Thanks for the feedback * John * Thread Starter [dave-kinnear](https://wordpress.org/support/users/dave-kinnear/) * (@dave-kinnear) * [5 years, 5 months ago](https://wordpress.org/support/topic/header-error-in-wp/#post-13818645) * Hi John, I’m sorry for the delay. Busy day yesterday. * WooHoo! Version 3 installed perfectly and the warning message is gone! Thanks so much for your attention. I am grateful—even though the warning message didn’t cause any issues on the website itself, it was disconcerting to keep seeing it. * I love this plugin and I recommended it to others when they need this functionality. * Dave Kinnear * Plugin Author [Jo4nny8](https://wordpress.org/support/users/jo4nny8/) * (@jo4nny8) * [5 years, 5 months ago](https://wordpress.org/support/topic/header-error-in-wp/#post-13820951) * Excellent, ill add the fix and send it to the repository. * Thanks for the patience and help. * [danildilawar](https://wordpress.org/support/users/danildilawar/) * (@danildilawar) * [5 years, 4 months ago](https://wordpress.org/support/topic/header-error-in-wp/#post-13924482) * Hi John, * I am having the same issue can you please send me updated version on my email too please? * My email is [danil.dilawar@gmail.com](https://wordpress.org/support/topic/header-error-in-wp/danil.dilawar@gmail.com?output_format=md) * Thanks in advance, * Plugin Author [Jo4nny8](https://wordpress.org/support/users/jo4nny8/) * (@jo4nny8) * [5 years, 4 months ago](https://wordpress.org/support/topic/header-error-in-wp/#post-13928159) * [@danildilawar](https://wordpress.org/support/users/danildilawar/) * Apologies I thought I had updated and committed the new files to the repository, but I hadn’t. * Version 1.0.2 has now been submitted so you should see an update message inside WordPress with the latest version with the fix included. * [danildilawar](https://wordpress.org/support/users/danildilawar/) * (@danildilawar) * [5 years, 4 months ago](https://wordpress.org/support/topic/header-error-in-wp/#post-13928990) * Hi John, * Thank you so much for the reply I saw updates available & updated plugin as well but I am still getting same error: * Warning: Cannot modify header information – headers already sent by (output started at /home/stoneleg/public_html/domainname.com/wp-content/plugins/wp-post-nav/admin/ partials/wp-post-nav-admin-instructions.php:12) in /home/stoneleg/public_html/ domainname.com/wp-admin/includes/misc.php on line 1310 * Let me know please. * Thanks, * Plugin Author [Jo4nny8](https://wordpress.org/support/users/jo4nny8/) * (@jo4nny8) * [5 years, 4 months ago](https://wordpress.org/support/topic/header-error-in-wp/#post-13929196) * [@danildilawar](https://wordpress.org/support/users/danildilawar/) * Ive just sent you a zip file with an updated version, please upload this over the top of the current version and advise me if this works please * [danildilawar](https://wordpress.org/support/users/danildilawar/) * (@danildilawar) * [5 years, 4 months ago](https://wordpress.org/support/topic/header-error-in-wp/#post-13929244) * Hi John, * Thank you so much bro it worked! 🙂 * Best Regards, Danil Dilawar * Plugin Author [Jo4nny8](https://wordpress.org/support/users/jo4nny8/) * (@jo4nny8) * [5 years, 4 months ago](https://wordpress.org/support/topic/header-error-in-wp/#post-13929274) * Excellent ill update it to V3 with the changes * John Viewing 13 replies - 1 through 13 (of 13 total) The topic ‘Header Error in WP’ is closed to new replies. * ![](https://ps.w.org/wp-post-nav/assets/icon-256x256.jpeg?rev=1969751) * [WP Post Nav](https://wordpress.org/plugins/wp-post-nav/) * [Frequently Asked Questions](https://wordpress.org/plugins/wp-post-nav/#faq) * [Support Threads](https://wordpress.org/support/plugin/wp-post-nav/) * [Active Topics](https://wordpress.org/support/plugin/wp-post-nav/active/) * [Unresolved Topics](https://wordpress.org/support/plugin/wp-post-nav/unresolved/) * [Reviews](https://wordpress.org/support/plugin/wp-post-nav/reviews/) ## Tags * [headers](https://wordpress.org/support/topic-tag/headers/) * 13 replies * 3 participants * Last reply from: [Jo4nny8](https://wordpress.org/support/users/jo4nny8/) * Last activity: [5 years, 4 months ago](https://wordpress.org/support/topic/header-error-in-wp/#post-13929274) * Status: resolved