I’m using Search&Filter plugin with a complete fresh install of Roots 7.0.3 and WP 4.1 with no other plugins installed. The plugin works fine with WP’s own themes, including TwentyFifteen and TwentyFourteen. But, with Roots it fails. Clicking Search&Filter’s Search button reloads the same page and returns this error:
Warning: Cannot modify header information - headers already sent by (output started at ./wp-content/themes/roots/templates/head.php:2) in /Users/me/Sites/mysite/wp-includes/pluggable.php on line 1178
I understand, plugin compatibility may be out of scope for this forum, but perhaps someone may know the reason without giving it too much thought?