I don’t get this warning, do you think you could create me an admin user on you site so I can debug it, for the sake of the comunity? if so write me here.
Sorry, I can’t give you access to my website.
Maybe it’s a conflict with woothemes/woocommerce/yoastSEO/wordfence.
After upgrade to Wp 4.2.1 (and plugin update to 1.9) i have a same error: Cannot send session cache limiter – headers already sent (output started at /***/wp-content/plugins/wp-embed-facebook/lib/core.php:504) in /***/wp-content/plugins/wp-embed-facebook/lib/fb/facebook.php on line 49
Same here after upgrading to WP 4.2.1 and Plugin to 1.9.
The problem may depend on the PHP Version, on my development box (PHP 5.5.9) there’s no problem, with the same site on a production server (PHP 5.3.24) I’ve also a problem with already sent headers.
Prior to the update I had WP 4.1.1 and Plugin 1.8.2 installed, which worked on both machines.
I’ve only two more plugins installed [1] [2], so it’s perhaps not a side effect with other plugins.
[1] https://wordpress.org/plugins/image-widget/
[2] https://wordpress.org/plugins/advanced-custom-fields/
/wp-content/plugins/wp-embed-facebook/lib/core.php
remove spaces after php closing tags.
Thanks joelsumadic!
Removing spaces after the closing php tag at the end of lib/core.php worked for me.
This error was fixed on new update, thank you all for your feedback and patience.
