Fatal error: Uncaught Error: Call to undefined function add_action() in /home/gre2019/public_html/solar/wp-includes/functions.php:5443 Stack trace: #0 /home/gre2019/public_html/solar/wp-settings.php(81): require() #1 /home/gre2019/public_html/solar/wp-config.php(89): require_once('/home/gre2019/p...') #2 /home/gre2019/public_html/solar/wp-load.php(37): require_once('/home/gre2019/p...') #3 /home/gre2019/public_html/solar/wp-blog-header.php(13): require_once('/home/gre2019/p...') #4 /home/gre2019/public_html/solar/index.php(17): require('/home/gre2019/p...') #5 {main} thrown in /home/gre2019/public_html/solar/wp-includes/functions.php on line 5443