Fatal error: Uncaught Error: Call to undefined function add_action() in /home/aitechmag/public_html/wp-blog-header.php:13
Stack trace:
#0 /home/aitechmag/public_html/wp-blog-header.php(13): WP_Blogs_Class->__construct()
#1 /home/aitechmag/public_html/index.php(17): require('/home/aitechmag...')
#2 {main}
thrown in /home/aitechmag/public_html/wp-blog-header.php on line 13