I have tried everything found on the internet. Removed plugins, changed theme, updated permissions, added define('CONCATENATE_SCRIPTS', false), updated php, used different browsers, cleared cache, etc. I just can't get it to come back alive. Had the same problem with 4.4 and reverted, but want to stay up to date.
Looking at console and my error logs I can narrow it down to this, but sadly far beyond my knowledge.
[warn] mod_fcgid: stderr: PHP Warning: call_user_func_array() expects parameter 1 to be a valid callback, function 'function after_content_text_sanitization_filters' not found or invalid function name in /home/linweb31/c/chiclocations.com-1074946348/user/htdocs/wp-includes/plugin.php on line 601
I am stumped. Anyone else had this problem?