My site is liahonahomebuilders.com. If you look closely within the header image on each page you'll see a line or two of code in dark gray front that looks like this across the bottom of the pic:
Warning: call_user_func_array() expects parameter 1 to be a valid callback, function 'primer_video_header' not found or invalid function name in /home/content/a2pewpnas01_data02/42/4014542/html/wp-includes/class-wp-hook.php on line 298
Some variation of this is in the same place on every page.
I thought it was a plugin problem, but when I deactivated all the plugins it was still there. I use this theme on another WP site as well (betterexit.com) and do not have this issue.
So what could it be? Please help!