Title: Cannot modify header information Last modified: August 30, 2016 --- # Cannot modify header information * Resolved [karenbush](https://wordpress.org/support/users/karenbush/) * (@karenbush) * [10 years, 10 months ago](https://wordpress.org/support/topic/cannot-modify-header-information-102/) * Hi David, * This private family site has been working perfectly until recently. Now when we type in the url, we get this error message: * Warning: Cannot modify header information – headers already sent by (output started at /home/*****/public_html/reunion/wp-content/themes/Memoir/page-blog.php:20) in /home/*****/public_html/reunion/wp-includes/pluggable.php on line 1196 * (I took out the server name. I hope that doesn’t matter to your consideration of this problem.) * Thanks for your help in solving this mystery. * [https://wordpress.org/plugins/jonradio-private-site/](https://wordpress.org/plugins/jonradio-private-site/) Viewing 9 replies - 1 through 9 (of 9 total) * Thread Starter [karenbush](https://wordpress.org/support/users/karenbush/) * (@karenbush) * [10 years, 10 months ago](https://wordpress.org/support/topic/cannot-modify-header-information-102/#post-6312979) * I should have mentioned that I checked with my theme’s support forum first. They suggested disabling plugins, which I did, one a a time, and the warning doesn’t appear when I disable “My Private Site.” Of course then it’s not private. * Plugin Author [David Gewirtz](https://wordpress.org/support/users/dgewirtz/) * (@dgewirtz) * [10 years, 10 months ago](https://wordpress.org/support/topic/cannot-modify-header-information-102/#post-6313034) * Not a lot I can do to help, except to ask if you know of any recent changes? Did you update a theme, a plugin, WordPress? Change hosts? Add any new plugins? * The reason I ask is if you know what changed, there’s at least some direction to go look. * Another approach is to switch themes temporarily and see if the problem goes away. You could also try re-downloading the plugin from the repository, but that’s more for completionist sake than for any tangible benefit. * Thread Starter [karenbush](https://wordpress.org/support/users/karenbush/) * (@karenbush) * [10 years, 10 months ago](https://wordpress.org/support/topic/cannot-modify-header-information-102/#post-6313035) * Thanks for the reply, David. Yes, there have been WordPress updates since I set up the site in December. My WordPress installation is fully up to date. I also added the TablePress plugin and Post Notifications by Email plugin. Deactivating those does not solve the problem, but deactivating Jonradio Private Site does. * Thread Starter [karenbush](https://wordpress.org/support/users/karenbush/) * (@karenbush) * [10 years, 10 months ago](https://wordpress.org/support/topic/cannot-modify-header-information-102/#post-6313039) * The theme is Memoir by Elegant Themes. I reinstalled it but that didn’t help. * [jon](https://wordpress.org/support/users/adiant/) * (@adiant) * [10 years, 10 months ago](https://wordpress.org/support/topic/cannot-modify-header-information-102/#post-6313040) * “headers already sent” errors can sometimes be diagnosed by turning on WP_DEBUG just long enough to test. Previously unseen messages are sometimes displayed. * Details at [https://codex.wordpress.org/Debugging_in_WordPress#WP_DEBUG](https://codex.wordpress.org/Debugging_in_WordPress#WP_DEBUG) * Thread Starter [karenbush](https://wordpress.org/support/users/karenbush/) * (@karenbush) * [10 years, 10 months ago](https://wordpress.org/support/topic/cannot-modify-header-information-102/#post-6313052) * Thanks Jonradio for this suggestion. * Plugin Author [David Gewirtz](https://wordpress.org/support/users/dgewirtz/) * (@dgewirtz) * [10 years, 10 months ago](https://wordpress.org/support/topic/cannot-modify-header-information-102/#post-6313090) * Thanks Jon. I fyou turn on WP_DEBUG, use the three defines specified in Brad’s article: * [https://deliciousbrains.com/why-use-wp-debug-log-wordpress-development/](https://deliciousbrains.com/why-use-wp-debug-log-wordpress-development/) * That way, data goes to a file and not to your screen, especially since you’re having display/rendering issues. * Also, have you tried a different theme, say the standard Twenty Fifteen theme, just to see if the behavior changes? * –David * Thread Starter [karenbush](https://wordpress.org/support/users/karenbush/) * (@karenbush) * [10 years, 10 months ago](https://wordpress.org/support/topic/cannot-modify-header-information-102/#post-6313092) * I finally did have to revise the site using a standard theme. The plugin works, so I have to assume the issue is between Memoir and the newer WordPress updates. * Thanks for your time with this. * Plugin Author [David Gewirtz](https://wordpress.org/support/users/dgewirtz/) * (@dgewirtz) * [10 years, 10 months ago](https://wordpress.org/support/topic/cannot-modify-header-information-102/#post-6313093) * Anytime. I know that Nick and the folks at Elegant Themes have been focusing on Divi and their plugins for the last year or two. so Memoir might be a bit out of date by now. * Let me know if you need any additional help. Viewing 9 replies - 1 through 9 (of 9 total) The topic ‘Cannot modify header information’ is closed to new replies. * ![](https://ps.w.org/jonradio-private-site/assets/icon-256x256.png?rev=3370795) * [My Private Site](https://wordpress.org/plugins/jonradio-private-site/) * [Frequently Asked Questions](https://wordpress.org/plugins/jonradio-private-site/#faq) * [Support Threads](https://wordpress.org/support/plugin/jonradio-private-site/) * [Active Topics](https://wordpress.org/support/plugin/jonradio-private-site/active/) * [Unresolved Topics](https://wordpress.org/support/plugin/jonradio-private-site/unresolved/) * [Reviews](https://wordpress.org/support/plugin/jonradio-private-site/reviews/) * 9 replies * 3 participants * Last reply from: [David Gewirtz](https://wordpress.org/support/users/dgewirtz/) * Last activity: [10 years, 10 months ago](https://wordpress.org/support/topic/cannot-modify-header-information-102/#post-6313093) * Status: resolved