Title: Problems with authentication Last modified: August 21, 2016 --- # Problems with authentication * Resolved [bugjemm](https://wordpress.org/support/users/bugjemm/) * (@bugjemm) * [12 years, 7 months ago](https://wordpress.org/support/topic/problems-with-authentication/) * When I try to ‘Grant authentication’ to Blipfoto via BlipPress, I get the following error message. * Warning: Cannot modify header information – headers already sent by (output started at /var/sites/b/bugjemm.net/public_html/wp-admin/includes/template.php:1692) in /var/sites/b/bugjemm.net/public_html/wp-content/plugins/blippress/inc/blipfoto- wordpress-api.php on line 114 * Any suggestions to help? * [http://wordpress.org/plugins/blippress/](http://wordpress.org/plugins/blippress/) Viewing 8 replies - 1 through 8 (of 8 total) * Plugin Author [Simon Blackbourn](https://wordpress.org/support/users/lumpysimon/) * (@lumpysimon) * [12 years, 7 months ago](https://wordpress.org/support/topic/problems-with-authentication/#post-4282962) * Hi * This looks very much like a conflict caused by another theme or plugin on your site. * Can you please try disabling your plugins one at a time, and after each disablement try the authentication again. If authentication is successful, let me know which plugin you disabled immediately before. I can then look at that plugin’s source code to determine what caused the conflict. * If that doesn’t work, try changing themes. If that solves it, let me know the name of the theme that caused the problem. * Sorry it’s a bit of a pain to do all this, but hopefully this process of elimination will get to the bottom of it. * Simon * Thread Starter [bugjemm](https://wordpress.org/support/users/bugjemm/) * (@bugjemm) * [12 years, 7 months ago](https://wordpress.org/support/topic/problems-with-authentication/#post-4282963) * Hiya * I’ve deactivated every plug-in except WordPress and switched between four different themes. Same error message every time 🙁 * Jemm * Plugin Author [Simon Blackbourn](https://wordpress.org/support/users/lumpysimon/) * (@lumpysimon) * [12 years, 7 months ago](https://wordpress.org/support/topic/problems-with-authentication/#post-4282965) * I’m not sure of your level of technical ability, so I have no idea if the following will make any sense… * One possible cause is if one of your PHP files has a space after a closing `? >` tag at the end of the file. Have you (or someone else) edited any PHP files? * If you have access to your wp-config.php file, can you check if any of the debug constants are defined in there? e.g. `define( 'WP_DEBUG', true );` * Or does your hosting server have `display_errors` turned on in the PHP config?( this is very unlikely but I’m clutching at straws!) * Any of these could generate output to the screen before the page loads, which could cause this problem. * Thread Starter [bugjemm](https://wordpress.org/support/users/bugjemm/) * (@bugjemm) * [12 years, 7 months ago](https://wordpress.org/support/topic/problems-with-authentication/#post-4282968) * It’s safe to say my technical ability is approaching zero – well, maybe 0.5. * I’ve not, to my knowledge, edited any php files and no one else has access to my WordPress site, but it was recently moved across from WordPress hosting to self-hosting on my own domain via the WordPress import Plugin, after being neglected for a long time, just in case that gives you a clue. I hadn’t tried to install your Plugin before it was moved and it was actually one of the first (but not the actual first) I installed and tried to authenticate once I’d made the move. I’ve not had similar problems with any of the other Plugins 🙁 Am I ok to reactivate them now? * I’ve just located the wp-config.php file and it says _* For developers: WordPress debugging mode. * * Change this to true to enable the display of notices during development. * It is strongly recommended that plugin and theme developers use WP\_DEBUG * in their development environments. */ define(‘WP\_DEBUG’, false); * Is the ‘display_errors’ going to be in the same file? If not, where am I likely to find it in my hosting File Manager? * Plugin Author [Simon Blackbourn](https://wordpress.org/support/users/lumpysimon/) * (@lumpysimon) * [12 years, 7 months ago](https://wordpress.org/support/topic/problems-with-authentication/#post-4282969) * The debug value in the wp-config.php file is fine. * Let me do some more investigation and I will get back to you as soon as possible. * You can re-activate your plugins/theme for now. * One more question: does the error message display immediately after you click the ‘authenticate’ button, or does it send you to blipfoto.com first and then show the error? * Thread Starter [bugjemm](https://wordpress.org/support/users/bugjemm/) * (@bugjemm) * [12 years, 7 months ago](https://wordpress.org/support/topic/problems-with-authentication/#post-4282971) * Ta re re-activation. * The message appears immediately when I click the authenticate button, definitely goes nowhere near Blipfoto.com, and BlipPress doesn’t appear in my Blipfoto apps page either. * 🙂 * Plugin Author [Simon Blackbourn](https://wordpress.org/support/users/lumpysimon/) * (@lumpysimon) * [12 years, 7 months ago](https://wordpress.org/support/topic/problems-with-authentication/#post-4282986) * Thanks very much for all your help over email, it really helped in pinpointing the cause of this one. * This is now fixed in version 0.2.1. * Happy Blipping! * Thread Starter [bugjemm](https://wordpress.org/support/users/bugjemm/) * (@bugjemm) * [12 years, 7 months ago](https://wordpress.org/support/topic/problems-with-authentication/#post-4282987) * Thanks for sorting it out so quickly, Simon – looking forward to using it now!! Viewing 8 replies - 1 through 8 (of 8 total) The topic ‘Problems with authentication’ is closed to new replies. * ![](https://s.w.org/plugins/geopattern-icon/blippress_67717b.svg) * [BlipPress](https://wordpress.org/plugins/blippress/) * [Frequently Asked Questions](https://wordpress.org/plugins/blippress/#faq) * [Support Threads](https://wordpress.org/support/plugin/blippress/) * [Active Topics](https://wordpress.org/support/plugin/blippress/active/) * [Unresolved Topics](https://wordpress.org/support/plugin/blippress/unresolved/) * [Reviews](https://wordpress.org/support/plugin/blippress/reviews/) * 8 replies * 2 participants * Last reply from: [bugjemm](https://wordpress.org/support/users/bugjemm/) * Last activity: [12 years, 7 months ago](https://wordpress.org/support/topic/problems-with-authentication/#post-4282987) * Status: resolved