Title: Link Library Version 4.2.6 problem! Last modified: August 19, 2016 --- # Link Library Version 4.2.6 problem! * [Burbridge](https://wordpress.org/support/users/cinemaminima/) * (@cinemaminima) * [15 years, 7 months ago](https://wordpress.org/support/topic/link-library-version-426-problem/) * I have just upgraded Link Library to version 4.2.6, using WordPress 3.0.1 automatic upgrade panel. * This message is returned at the top of the Dashboard: * `Warning: session_start() [function.session-start]: Cannot send session cache limiter - headers already sent (output started at /path-to/wp-content/plugins/ link-library/link-library.php:1) in /path-to/wp-content/plugins/si-contact-form/ si-contact-form.php on line 1115` * And on the public Web pages: * `Warning: Cannot modify header information - headers already sent by (output started at /path-to/wp-content/plugins/link-library/link-library.php:1) in /path- to/wp-content/plugins/wp-super-cache/wp-cache-phase2.php on line 69` * `Warning: session_start() [function.session-start]: Cannot send session cache limiter - headers already sent (output started at /path-to/wp-content/plugins/ link-library/link-library.php:1) in /path-to/wp-content/plugins/si-contact-form/ si-contact-form.php on line 1115` Viewing 15 replies - 1 through 15 (of 19 total) 1 [2](https://wordpress.org/support/topic/link-library-version-426-problem/page/2/?output_format=md) [→](https://wordpress.org/support/topic/link-library-version-426-problem/page/2/?output_format=md) * [TheGraciousPantry](https://wordpress.org/support/users/thegraciouspantry/) * (@thegraciouspantry) * [15 years, 7 months ago](https://wordpress.org/support/topic/link-library-version-426-problem/#post-1656061) * I just upgraded it as well (like 20 minutes ago) and now I get this warning: * Warning: Cannot modify header information – headers already sent by (output started at… * No matter where I go in my blog, this warning pops up. * **HELP!!!!** My readers really depend on this plugin! * Tiffany @ The Gracious Pantry * [adminbsd](https://wordpress.org/support/users/adminbsd/) * (@adminbsd) * [15 years, 7 months ago](https://wordpress.org/support/topic/link-library-version-426-problem/#post-1656078) * Same here! * Warning: Cannot modify header information – headers already sent by (output started at… * Page not loading 404 error… * [christian-s](https://wordpress.org/support/users/christian-s/) * (@christian-s) * [15 years, 7 months ago](https://wordpress.org/support/topic/link-library-version-426-problem/#post-1656082) * I’m also getting various errors, like `Warning: Cannot modify header information- headers already sent by (output started at .../public_html/wp-content/plugins/ link-library/link-library.php:1) in .../public_html/wp-includes/pluggable.php on line 890` * and when I log off I get a page with * ``` Warning: Cannot modify header information - headers already sent by (output started at .../public_html/wp-content/plugins/link-library/link-library.php:1) in .../public_html/wp-login.php on line 337 Warning: Cannot modify header information - headers already sent by (output started at .../public_html/wp-content/plugins/link-library/link-library.php:1) in .../public_html/wp-login.php on line 349 Warning: Cannot modify header information - headers already sent by (output started at .../public_html/wp-content/plugins/link-library/link-library.php:1) in .../public_html/wp-includes/pluggable.php on line 717 Warning: Cannot modify header information - headers already sent by (output started at .../public_html/wp-content/plugins/link-library/link-library.php:1) in .../public_html/wp-includes/pluggable.php on line 718 Warning: Cannot modify header information - headers already sent by (output started at .../public_html/wp-content/plugins/link-library/link-library.php:1) in .../public_html/wp-includes/pluggable.php on line 719 Warning: Cannot modify header information - headers already sent by (output started at .../public_html/wp-content/plugins/link-library/link-library.php:1) in .../public_html/wp-includes/pluggable.php on line 720 Warning: Cannot modify header information - headers already sent by (output started at .../public_html/wp-content/plugins/link-library/link-library.php:1) in .../public_html/wp-includes/pluggable.php on line 721 Warning: Cannot modify header information - headers already sent by (output started at .../public_html/wp-content/plugins/link-library/link-library.php:1) in .../public_html/wp-includes/pluggable.php on line 722 Warning: Cannot modify header information - headers already sent by (output started at .../public_html/wp-content/plugins/link-library/link-library.php:1) in .../public_html/wp-includes/pluggable.php on line 725 Warning: Cannot modify header information - headers already sent by (output started at .../public_html/wp-content/plugins/link-library/link-library.php:1) in .../public_html/wp-includes/pluggable.php on line 726 Warning: Cannot modify header information - headers already sent by (output started at .../public_html/wp-content/plugins/link-library/link-library.php:1) in .../public_html/wp-includes/pluggable.php on line 727 Warning: Cannot modify header information - headers already sent by (output started at .../public_html/wp-content/plugins/link-library/link-library.php:1) in .../public_html/wp-includes/pluggable.php on line 728 Warning: Cannot modify header information - headers already sent by (output started at .../public_html/wp-content/plugins/link-library/link-library.php:1) in .../public_html/wp-includes/pluggable.php on line 731 Warning: Cannot modify header information - headers already sent by (output started at .../public_html/wp-content/plugins/link-library/link-library.php:1) in .../public_html/wp-includes/pluggable.php on line 732 Warning: Cannot modify header information - headers already sent by (output started at .../public_html/wp-content/plugins/link-library/link-library.php:1) in .../public_html/wp-includes/pluggable.php on line 733 Warning: Cannot modify header information - headers already sent by (output started at .../public_html/wp-content/plugins/link-library/link-library.php:1) in .../public_html/wp-includes/pluggable.php on line 734 Warning: Cannot modify header information - headers already sent by (output started at .../public_html/wp-content/plugins/link-library/link-library.php:1) in .../public_html/wp-includes/pluggable.php on line 890 ``` * [bratki](https://wordpress.org/support/users/bratki/) * (@bratki) * [15 years, 7 months ago](https://wordpress.org/support/topic/link-library-version-426-problem/#post-1656101) * I have the same problem as cinemaminima. * And on the public Web pages: * Fatal error: Call to undefined method wpdb::get_blog_prefix() in /home/h21203/ data/www/azovsea.in.ua/wp-content/plugins/link-library/link-library.php on line 4405 * While deactivating plugin the problem is: * Warning: Cannot modify header information – headers already sent by (output started at /home/……/wp-content/plugins/link-library/link-library.php:1) in /home/……./ wp-includes/pluggable.php on line 868 * [xad](https://wordpress.org/support/users/xad/) * (@xad) * [15 years, 7 months ago](https://wordpress.org/support/topic/link-library-version-426-problem/#post-1656112) * I have the same problem as bratki. * Totally broken, i want to downgrade it! * [BeeCee](https://wordpress.org/support/users/csigncsign/) * (@csigncsign) * [15 years, 7 months ago](https://wordpress.org/support/topic/link-library-version-426-problem/#post-1656131) * I have this, too: * ```  Warning: Cannot modify header information - headers already sent by (output started at /homepages/25/d13574424/htdocs/multisites/wp-content/plugins/link-library/link-library.php:1) in /homepages/25/d13574424/htdocs/multisites/wp-includes/pluggable.php on line 690 Warning: Cannot modify header information - headers already sent by (output started at /homepages/25/d13574424/htdocs/multisites/wp-content/plugins/link-library/link-library.php:1) in /homepages/25/d13574424/htdocs/multisites/wp-includes/pluggable.php on line 691 Warning: Cannot modify header information - headers already sent by (output started at /homepages/25/d13574424/htdocs/multisites/wp-content/plugins/link-library/link-library.php:1) in /homepages/25/d13574424/htdocs/multisites/wp-includes/pluggable.php on line 692 Warning: Cannot modify header information - headers already sent by (output started at /homepages/25/d13574424/htdocs/multisites/wp-content/plugins/link-library/link-library.php:1) in /homepages/25/d13574424/htdocs/multisites/wp-includes/pluggable.php on line 890 ``` * [kebas53](https://wordpress.org/support/users/kebas53/) * (@kebas53) * [15 years, 7 months ago](https://wordpress.org/support/topic/link-library-version-426-problem/#post-1656134) * Seems to be that the file link-library.php is saved with wrong coding format. All strange characters in the file. Please upload the right file… * [kebas53](https://wordpress.org/support/users/kebas53/) * (@kebas53) * [15 years, 7 months ago](https://wordpress.org/support/topic/link-library-version-426-problem/#post-1656137) * Problem halfway solved. * **Download file link-library.php to a local disk (networkdisk) and upload it again to your webserver overwriting the old one !!** * For me the error on all other pages behalve of the link-page are gone. * On the link page I still got an error: Warning: Cannot modify header information– headers already sent by (output started at /customers/domain/domain/httpd.www/ wp-content/plugins/link-library/link-library.php:1) in /customers/domain/domain/ httpd.www/wp-includes/pluggable.php on line 890 * Also noticed, that my JWPlayer isn’t working anymore! * Kindly regards, Jacob. * [fmclaughlin](https://wordpress.org/support/users/fmclaughlin/) * (@fmclaughlin) * [15 years, 7 months ago](https://wordpress.org/support/topic/link-library-version-426-problem/#post-1656157) * I am experiencing the same problems. * [christian-s](https://wordpress.org/support/users/christian-s/) * (@christian-s) * [15 years, 7 months ago](https://wordpress.org/support/topic/link-library-version-426-problem/#post-1656164) * I downloaded the 4.2.6 package, unzipped locally and uploaded the link_library via FTP to site and let it overwrite all files as needed. This did not solve the problem for me. Still getting header errors. * [deano65](https://wordpress.org/support/users/deano65/) * (@deano65) * [15 years, 7 months ago](https://wordpress.org/support/topic/link-library-version-426-problem/#post-1656172) * I updated the plugin just 30 mins ago and it has now stopped working. * tried to re-install and no luck! * [deano65](https://wordpress.org/support/users/deano65/) * (@deano65) * [15 years, 7 months ago](https://wordpress.org/support/topic/link-library-version-426-problem/#post-1656173) * im getting: * _**‘Plugin could not be activated because it triggered a fatal error.’**_ * [kymar](https://wordpress.org/support/users/kymar/) * (@kymar) * [15 years, 7 months ago](https://wordpress.org/support/topic/link-library-version-426-problem/#post-1656201) * I was getting the “headers already sent” warning mentioned above, which mentioned WP Super-Cache. When I turned Super-Cache _completely _off, including regular WP caching, the warning went away. Obviously, only a temporary fix, but those who are receiving other errors might look into disabling caching until the author has fixed this problem. * [TheGraciousPantry](https://wordpress.org/support/users/thegraciouspantry/) * (@thegraciouspantry) * [15 years, 7 months ago](https://wordpress.org/support/topic/link-library-version-426-problem/#post-1656209) * I disabled Link LIbrary completely until it’s fixed. * Plugin Author [Yannick Lefebvre](https://wordpress.org/support/users/jackdewey/) * (@jackdewey) * [15 years, 7 months ago](https://wordpress.org/support/topic/link-library-version-426-problem/#post-1656222) * The double-checked the changes that I made last night and the main one which might be responsible for this is the line that says: * network: true * towards the top of the plugin. * Please try removing this line and see if it works for you. * Which version of WordPress are you using? * The odd thing is that I am not getting errors on my live site with the new update. Viewing 15 replies - 1 through 15 (of 19 total) 1 [2](https://wordpress.org/support/topic/link-library-version-426-problem/page/2/?output_format=md) [→](https://wordpress.org/support/topic/link-library-version-426-problem/page/2/?output_format=md) The topic ‘Link Library Version 4.2.6 problem!’ is closed to new replies. * ![](https://ps.w.org/link-library/assets/icon-256x256.jpg?rev=971117) * [Link Library](https://wordpress.org/plugins/link-library/) * [Frequently Asked Questions](https://wordpress.org/plugins/link-library/#faq) * [Support Threads](https://wordpress.org/support/plugin/link-library/) * [Active Topics](https://wordpress.org/support/plugin/link-library/active/) * [Unresolved Topics](https://wordpress.org/support/plugin/link-library/unresolved/) * [Reviews](https://wordpress.org/support/plugin/link-library/reviews/) * 19 replies * 13 participants * Last reply from: [joppjopp](https://wordpress.org/support/users/joppjopp/) * Last activity: [15 years, 7 months ago](https://wordpress.org/support/topic/link-library-version-426-problem/page/2/#post-1656227) * Status: not resolved