Title: Upgrade warning Last modified: August 21, 2016 --- # Upgrade warning * Resolved [Carlos Puga](https://wordpress.org/support/users/carlospuga68/) * (@carlospuga68) * [12 years, 10 months ago](https://wordpress.org/support/topic/upgrade-warning/) * Hello I just update to new version and I am getting this warning: * Warning: Cannot modify header information – headers already sent by (output started at /home/content/55/9059855/html/wp-content/plugins/leaflet-maps-marker/inc/changelog. php:5) in /home/content/55/9059855/html/wp-content/plugins/woocommerce/classes/ class-wc-session-handler.php on line 63 * Dont now what to do, please help. * Thanks * [http://wordpress.org/extend/plugins/leaflet-maps-marker/](http://wordpress.org/extend/plugins/leaflet-maps-marker/) Viewing 13 replies - 1 through 13 (of 13 total) * Plugin Author [Robert Seyfriedsberger](https://wordpress.org/support/users/harmr/) * (@harmr) * [12 years, 10 months ago](https://wordpress.org/support/topic/upgrade-warning/#post-3952115) * could you please send d me temporary admin access so that I can have a look? * Plugin Author [Robert Seyfriedsberger](https://wordpress.org/support/users/harmr/) * (@harmr) * [12 years, 10 months ago](https://wordpress.org/support/topic/upgrade-warning/#post-3952141) * Hi, I took a look again & as far as I understand the issue here, this is caused by woocommerce & needs to be fixed by them. I opened a support ticket here: [http://wordpress.org/support/topic/plugin-conflict-with-leaflet-maps-marker-1?replies=1#post-4446330](http://wordpress.org/support/topic/plugin-conflict-with-leaflet-maps-marker-1?replies=1#post-4446330) best, Robert * PS: no admin access needed currently anymore. * Thread Starter [Carlos Puga](https://wordpress.org/support/users/carlospuga68/) * (@carlospuga68) * [12 years, 10 months ago](https://wordpress.org/support/topic/upgrade-warning/#post-3952169) * Thank you Robert, I will wait to hear from WooCommerce suport * Plugin Author [Robert Seyfriedsberger](https://wordpress.org/support/users/harmr/) * (@harmr) * [12 years, 10 months ago](https://wordpress.org/support/topic/upgrade-warning/#post-3952453) * Hi Carlos, can you please download the zip-file from [http://test.mapsmarker.com/changelog.zip](http://test.mapsmarker.com/changelog.zip)– unzip it and upload the file changelog.php to /wp-content/plugins/leaflet-maps- marker/inc/ (overwriting the existing file). Please tell me if this removes the warning message – if yes, this fix will officially be included in the next 3.6.1 release. best, Robert * Thread Starter [Carlos Puga](https://wordpress.org/support/users/carlospuga68/) * (@carlospuga68) * [12 years, 10 months ago](https://wordpress.org/support/topic/upgrade-warning/#post-3952455) * Hello Robert I just replace the file and sill have the following mesaage: * Warning: Cannot modify header information – headers already sent by (output started at /home/content/55/9059855/html/wp-content/plugins/leaflet-maps-marker/inc/changelog. php:5) in /home/content/55/9059855/html/wp-content/plugins/woocommerce/classes/ class-wc-session-handler.php on line 63 Changelog for version 3.6 – released on 22.07.2013 (blog post with more details about this release): * Thread Starter [Carlos Puga](https://wordpress.org/support/users/carlospuga68/) * (@carlospuga68) * [12 years, 10 months ago](https://wordpress.org/support/topic/upgrade-warning/#post-3952456) * I just send you the password * Thread Starter [Carlos Puga](https://wordpress.org/support/users/carlospuga68/) * (@carlospuga68) * [12 years, 10 months ago](https://wordpress.org/support/topic/upgrade-warning/#post-3952457) * Please give 2 hours It might be some changes happening from an upgrade of hosting. * Thread Starter [Carlos Puga](https://wordpress.org/support/users/carlospuga68/) * (@carlospuga68) * [12 years, 10 months ago](https://wordpress.org/support/topic/upgrade-warning/#post-3952458) * How did you fix it???? * Plugin Author [Robert Seyfriedsberger](https://wordpress.org/support/users/harmr/) * (@harmr) * [12 years, 10 months ago](https://wordpress.org/support/topic/upgrade-warning/#post-3952463) * Hi Carlos, did the file I sent you fix the issue now? best, Robert * Thread Starter [Carlos Puga](https://wordpress.org/support/users/carlospuga68/) * (@carlospuga68) * [12 years, 10 months ago](https://wordpress.org/support/topic/upgrade-warning/#post-3952466) * Hello Robert, did you enter to my site and fix the problem? * How did you do it? * Two plugings are not active now, one is not important but the second one I beleive is, the WP Security, is this one creating the problem? * Thanks for your help. * Plugin Author [Robert Seyfriedsberger](https://wordpress.org/support/users/harmr/) * (@harmr) * [12 years, 10 months ago](https://wordpress.org/support/topic/upgrade-warning/#post-3952467) * Hi Carlos, no, it wasn’t me – didn’t have the time to login on your site yet. Anyway great to hear that it is working now 😉 best, Robert * Thread Starter [Carlos Puga](https://wordpress.org/support/users/carlospuga68/) * (@carlospuga68) * [12 years, 10 months ago](https://wordpress.org/support/topic/upgrade-warning/#post-3952468) * Wow, then did someone that works with you could be the one that enter to the site? * Someone did and make changes… * Plugin Author [Robert Seyfriedsberger](https://wordpress.org/support/users/harmr/) * (@harmr) * [12 years, 10 months ago](https://wordpress.org/support/topic/upgrade-warning/#post-3952469) * Hi Carlos, no – just I received your access data and I didnt use it for lack of time. I would ask your provider if he had made any changes to your server configuration – this is the only thing I can think of (beside someone else working as an admin on your site) that could have lead to this. best, Robert Viewing 13 replies - 1 through 13 (of 13 total) The topic ‘Upgrade warning’ is closed to new replies. * ![](https://ps.w.org/leaflet-maps-marker/assets/icon.svg?rev=970936) * [Leaflet Maps Marker (Google Maps, OpenStreetMap, Bing Maps)](https://wordpress.org/plugins/leaflet-maps-marker/) * [Frequently Asked Questions](https://wordpress.org/plugins/leaflet-maps-marker/#faq) * [Support Threads](https://wordpress.org/support/plugin/leaflet-maps-marker/) * [Active Topics](https://wordpress.org/support/plugin/leaflet-maps-marker/active/) * [Unresolved Topics](https://wordpress.org/support/plugin/leaflet-maps-marker/unresolved/) * [Reviews](https://wordpress.org/support/plugin/leaflet-maps-marker/reviews/) * 13 replies * 2 participants * Last reply from: [Robert Seyfriedsberger](https://wordpress.org/support/users/harmr/) * Last activity: [12 years, 10 months ago](https://wordpress.org/support/topic/upgrade-warning/#post-3952469) * Status: resolved