Title: Cannot modify header error Last modified: August 21, 2016 --- # Cannot modify header error * Resolved [jonahrbrown](https://wordpress.org/support/users/jonahrbrown/) * (@jonahrbrown) * [12 years, 7 months ago](https://wordpress.org/support/topic/cannot-modify-header-error-5/) * Plugin version 1.4 * /public_html/wp-content/plugins/sucuri-scanner/sucuri.php on line 625 * [http://wordpress.org/plugins/sucuri-scanner/](http://wordpress.org/plugins/sucuri-scanner/) Viewing 15 replies - 1 through 15 (of 22 total) 1 [2](https://wordpress.org/support/topic/cannot-modify-header-error-5/page/2/?output_format=md) [→](https://wordpress.org/support/topic/cannot-modify-header-error-5/page/2/?output_format=md) * Thread Starter [jonahrbrown](https://wordpress.org/support/users/jonahrbrown/) * (@jonahrbrown) * [12 years, 7 months ago](https://wordpress.org/support/topic/cannot-modify-header-error-5/#post-4046356) * The error seemed to have gone away. * [fruityoaty](https://wordpress.org/support/users/fruityoaty/) * (@fruityoaty) * [12 years, 7 months ago](https://wordpress.org/support/topic/cannot-modify-header-error-5/#post-4046454) * I am getting the same error as above when I login to WordPress. Plugin version 1.4 on WordPress 3.6. * In addition, these other errors: /wp-content/plugins/sucuri-scanner/sucuri.php: 360) in /public_html/wp-includes/option.php on line 571 * wp-content/plugins/sucuri-scanner/sucuri.php:360) in /public_html/wp-includes/ option.php on line 572 * Unlike the above user, the “line 625” error has not gone away on my site. The previous version was working fine… until I updated to version 1.4. * [dremeda](https://wordpress.org/support/users/dremeda/) * (@dremeda) * [12 years, 7 months ago](https://wordpress.org/support/topic/cannot-modify-header-error-5/#post-4046500) * Hi there! Are you still experiencing the issue? We are not able to reproduce here. * What other plugins do you have enabled? * Thanks! Dre * [streetlove](https://wordpress.org/support/users/streetlove/) * (@streetlove) * [12 years, 7 months ago](https://wordpress.org/support/topic/cannot-modify-header-error-5/#post-4046515) * Still doesn’t solve the issue. There’s an update a while ago. Now I ended with another box of error message after the update. * [streetlove](https://wordpress.org/support/users/streetlove/) * (@streetlove) * [12 years, 7 months ago](https://wordpress.org/support/topic/cannot-modify-header-error-5/#post-4046517) * Now all error message is gone. * [fruityoaty](https://wordpress.org/support/users/fruityoaty/) * (@fruityoaty) * [12 years, 7 months ago](https://wordpress.org/support/topic/cannot-modify-header-error-5/#post-4046525) * I updated to version 1.4.1. The “line 625” error disappeared, however, the “line 571” and “line 572” errors appeared on top of the “Last user login” yellow message box right after I updated the plugin. * Strangely, after I logged out and then logged back in to WordPress, the ERROR MESSAGES ALL DISAPPEARED. * I then cleared my browser cache and logged in again. The “line 571” and “line 572” errors again appeared on top of the “Last user login” yellow message box. * It seems that the errors only appear: 1. After updating the plugin. 2. When the user logins to WordPress (and previous login cookie has expired/cleared from browser cache). * [mathewmackenzie](https://wordpress.org/support/users/mathewmackenzie/) * (@mathewmackenzie) * [12 years, 7 months ago](https://wordpress.org/support/topic/cannot-modify-header-error-5/#post-4046540) * OK Im getting the problem as well, but also something new. WP3.6. With version 1.4 I get this error message: * [http://www.flickr.com/photos/mathewmackenzie/9559542235/](http://www.flickr.com/photos/mathewmackenzie/9559542235/) * Like the others this error is intermittent, but keeps coming back. * Then after upgrading to 1.4.1 I get a funny box with some code in it, that I can click a cross to close… * [http://www.flickr.com/photos/mathewmackenzie/9562334426/](http://www.flickr.com/photos/mathewmackenzie/9562334426/) * This across more than one site, with different plugins. All errors disappear when plugin deactivated, and return when reactivated. * Afraid I’m going to have to shut down your plugin until this is fixed. * [saturnus](https://wordpress.org/support/users/saturnus/) * (@saturnus) * [12 years, 7 months ago](https://wordpress.org/support/topic/cannot-modify-header-error-5/#post-4046561) * I’m getting the modify header errors as well. They only go away when I deactivate this plug-in. So it’s nothing to do with other plug-ins, this one just needs to be fixed. And yes I did update. * [dremeda](https://wordpress.org/support/users/dremeda/) * (@dremeda) * [12 years, 7 months ago](https://wordpress.org/support/topic/cannot-modify-header-error-5/#post-4046564) * Thanks everyone for the input, we’re testing right now to see what’s going on. We’ll update ASAP. * [rvc2](https://wordpress.org/support/users/rvconnelly/) * (@rvconnelly) * [12 years, 7 months ago](https://wordpress.org/support/topic/cannot-modify-header-error-5/#post-4046575) * I am getting the same error **and I am now unable to login to my client’s site**. - Any assistance would be appreciated! * I am listing the entire set of errors (below) in case it helps. I get these by simply navigating to the site’s WP login screen (i.e., /wp-admin) and the WP login box/fields is displayed below this long list of errors: * Warning: Missing argument 2 for sucuri_login_redirect() in /home/content/89/8175589/ html/wp-content/plugins/sucuri-scanner/sucuri.php on line 619 * Warning: Missing argument 3 for sucuri_login_redirect() in /home/content/89/8175589/ html/wp-content/plugins/sucuri-scanner/sucuri.php on line 619 * Warning: Cannot modify header information – headers already sent by (output started at /home/content/89/8175589/html/wp-content/plugins/sucuri-scanner/sucuri.php: 619) in /home/content/89/8175589/html/wp-includes/pluggable.php on line 695 * Warning: Cannot modify header information – headers already sent by (output started at /home/content/89/8175589/html/wp-content/plugins/sucuri-scanner/sucuri.php: 619) in /home/content/89/8175589/html/wp-includes/pluggable.php on line 696 * Warning: Cannot modify header information – headers already sent by (output started at /home/content/89/8175589/html/wp-content/plugins/sucuri-scanner/sucuri.php: 619) in /home/content/89/8175589/html/wp-includes/pluggable.php on line 697 * Warning: Cannot modify header information – headers already sent by (output started at /home/content/89/8175589/html/wp-content/plugins/sucuri-scanner/sucuri.php: 619) in /home/content/89/8175589/html/wp-includes/pluggable.php on line 698 * Warning: Cannot modify header information – headers already sent by (output started at /home/content/89/8175589/html/wp-content/plugins/sucuri-scanner/sucuri.php: 619) in /home/content/89/8175589/html/wp-includes/pluggable.php on line 699 * Warning: Cannot modify header information – headers already sent by (output started at /home/content/89/8175589/html/wp-content/plugins/sucuri-scanner/sucuri.php: 619) in /home/content/89/8175589/html/wp-includes/pluggable.php on line 700 * Warning: Cannot modify header information – headers already sent by (output started at /home/content/89/8175589/html/wp-content/plugins/sucuri-scanner/sucuri.php: 619) in /home/content/89/8175589/html/wp-includes/pluggable.php on line 703 * Warning: Cannot modify header information – headers already sent by (output started at /home/content/89/8175589/html/wp-content/plugins/sucuri-scanner/sucuri.php: 619) in /home/content/89/8175589/html/wp-includes/pluggable.php on line 704 * Warning: Cannot modify header information – headers already sent by (output started at /home/content/89/8175589/html/wp-content/plugins/sucuri-scanner/sucuri.php: 619) in /home/content/89/8175589/html/wp-includes/pluggable.php on line 705 * Warning: Cannot modify header information – headers already sent by (output started at /home/content/89/8175589/html/wp-content/plugins/sucuri-scanner/sucuri.php: 619) in /home/content/89/8175589/html/wp-includes/pluggable.php on line 706 * Warning: Cannot modify header information – headers already sent by (output started at /home/content/89/8175589/html/wp-content/plugins/sucuri-scanner/sucuri.php: 619) in /home/content/89/8175589/html/wp-includes/pluggable.php on line 709 * Warning: Cannot modify header information – headers already sent by (output started at /home/content/89/8175589/html/wp-content/plugins/sucuri-scanner/sucuri.php: 619) in /home/content/89/8175589/html/wp-includes/pluggable.php on line 710 * Warning: Cannot modify header information – headers already sent by (output started at /home/content/89/8175589/html/wp-content/plugins/sucuri-scanner/sucuri.php: 619) in /home/content/89/8175589/html/wp-includes/pluggable.php on line 711 * Warning: Cannot modify header information – headers already sent by (output started at /home/content/89/8175589/html/wp-content/plugins/sucuri-scanner/sucuri.php: 619) in /home/content/89/8175589/html/wp-includes/pluggable.php on line 712 * **When I do try to login I simply get the following 3 errors (and then whitespace— no access to my client’s site)…** * Warning: Missing argument 2 for sucuri_login_redirect() in /home/content/89/8175589/ html/wp-content/plugins/sucuri-scanner/sucuri.php on line 619 * Warning: Missing argument 3 for sucuri_login_redirect() in /home/content/89/8175589/ html/wp-content/plugins/sucuri-scanner/sucuri.php on line 619 * Warning: Cannot modify header information – headers already sent by (output started at /home/content/89/8175589/html/wp-content/plugins/sucuri-scanner/sucuri.php: 619) in /home/content/89/8175589/html/wp-includes/pluggable.php on line 875 * [rvc2](https://wordpress.org/support/users/rvconnelly/) * (@rvconnelly) * [12 years, 7 months ago](https://wordpress.org/support/topic/cannot-modify-header-error-5/#post-4046576) * I found out I was actually logged in to my client’s WP site when I navigated to the site’s home page. I then deactivated the Sucuri plugin and now can log in and out of the site with no problem. * Here is some additional info I should have included in the above post… WP version: 3.6 Theme: Atahualpa, current version: 3.7.12 Other plugins installed: (all current versions) Share Buttons by AddToAny, Stop Spammer Registrations Plugin, WordPress Importer, Secure WordPress, and WP Security Scan. * Thanks. * [dremeda](https://wordpress.org/support/users/dremeda/) * (@dremeda) * [12 years, 7 months ago](https://wordpress.org/support/topic/cannot-modify-header-error-5/#post-4046582) * Hey there, the team is looking into it to try and reproduce. By chance did you try disabling all the other plugins to see if the error goes away? * Thanks, Dre * [rvc2](https://wordpress.org/support/users/rvconnelly/) * (@rvconnelly) * [12 years, 7 months ago](https://wordpress.org/support/topic/cannot-modify-header-error-5/#post-4046583) * Sorry, I have not had the time to test by disabling the other plugins. I have highly customized some of then (e.g., stopspammers.) If I deactivate, I will need to reproduce the configurations which will take some time. I’m buried with work today. If your testers are not able to reproduce sooner than later, I will try to make time for it tomorrow. Cheers, Bob * [fruityoaty](https://wordpress.org/support/users/fruityoaty/) * (@fruityoaty) * [12 years, 7 months ago](https://wordpress.org/support/topic/cannot-modify-header-error-5/#post-4046597) * I updated to version 1.4.2. The update did not make errors go away. Instead, it introduced a new error that appears on my WordPress login page – /wp-login. php: * Warning: Missing argument 2 for sucuri_login_redirect() in /wp-content/plugins/ sucuri-scanner/sucuri.php on line 619 * The “line 571” and “line 572” still occur. * The errors only occur after I login (when the WordPress cookie login has expired/ been cleared from browser cache). If I logout out and then log back in the same open browser tab, the errors will not appear. But if clear the browser cache, close the browser, re-open the browser and log back in, the errors occur. * [fruityoaty](https://wordpress.org/support/users/fruityoaty/) * (@fruityoaty) * [12 years, 7 months ago](https://wordpress.org/support/topic/cannot-modify-header-error-5/#post-4046598) * OK, I updated now to version 1.4.3. The “line 619” error that was introduced to my blog in version 1.4.2 has now gone away. * However, the “line 571” and “line 572” error messages that were introduced when I updated from 1.3 to 1.4 (1.4.1, 1.4.2, 1.4.3) still persist after I login. I suppose I could live with the errors since they do not appear on the front- end… and they don’t show up all the time. Still… kinda annoying. Hope it gets fixed, otherwise I guess I’ll just revert to version 1.3. Viewing 15 replies - 1 through 15 (of 22 total) 1 [2](https://wordpress.org/support/topic/cannot-modify-header-error-5/page/2/?output_format=md) [→](https://wordpress.org/support/topic/cannot-modify-header-error-5/page/2/?output_format=md) The topic ‘Cannot modify header error’ is closed to new replies. * ![](https://ps.w.org/sucuri-scanner/assets/icon-256x256.png?rev=2875755) * [Sucuri Security - Auditing, Malware Scanner and Security Hardening](https://wordpress.org/plugins/sucuri-scanner/) * [Frequently Asked Questions](https://wordpress.org/plugins/sucuri-scanner/#faq) * [Support Threads](https://wordpress.org/support/plugin/sucuri-scanner/) * [Active Topics](https://wordpress.org/support/plugin/sucuri-scanner/active/) * [Unresolved Topics](https://wordpress.org/support/plugin/sucuri-scanner/unresolved/) * [Reviews](https://wordpress.org/support/plugin/sucuri-scanner/reviews/) * 22 replies * 10 participants * Last reply from: [yorman](https://wordpress.org/support/users/yorman/) * Last activity: [11 years, 8 months ago](https://wordpress.org/support/topic/cannot-modify-header-error-5/page/2/#post-4046857) * Status: resolved