Error on the bottom of each page since updating theme

Hello,

This error keeps appearing since I updated the origami premium theme

Warning: call_user_func_array() expects parameter 1 to be a valid callback, function 'siteorigin_ajax_comments_filter_template' not found or invalid function name in /home/outdoorhighlands/outdoorhighlands.co.uk/wp-includes/plugin.php on line 173

This appears on every page apart from the homepage. I’d appreciate your help with this matter.

Thanks