I was getting an error whenever I tried to login to my wordpress blog as admin. Warning: Cannot modify header information - headers already sent by (output started at /home/content/78/6482878/html/wp-content/plugins/AutoBlogFeeder/disable-canonical-redirects.php:12) in /home/content/78/6482878/html/wp-includes/pluggable.php on line 890 I went through some forums and checked both the "disable-canonical-redirects.php and pluggable.php" for extra spaces, there were none. Then I disabled the plugins using FTP. That worked. After I logged in as admin. I activated all the plugins again. Opened "Amazon Autoposter", tried to post but it gave some error and after that same problem and had to disable plugins again using FTP. So, it seems it's an issue with one of the plugins (probably 'Amazon Autoposter'). How can I find out which plugin is causing the problem and how to rectify it? Thanks in advance
Start over with the plugin. Check to make sure you have all of the files for the plugin. It could be a missing or damaged file.
@WC Rocket: Thanks for the quick reply. I tried it again just now and this time when I login as an admin and click on the plugins, it went to the same error. That means the moment I activated the plugins using FTP. DO you want me to check files of every plugin?
I was assuming you were only deactivating the problem plugin. If you have not done that, deactivate it and leave the others active. Completely delete the plugin from the plugins folder. I suggest downloading the plugin from where you obtained it again. Upload the plugin using WordPress's upload plugin feature, not FTP. Once it has completed, active it. If you receive the error again, delete it by FTP. At this point, you will need to contact the developer of the plugin to sort out the issue. Hope that helps! Good luck!
I don't understand. It seems you already know what plug in is causing the problem. I would contact the developer's support page to see if there are any solutions there.