Fatal error: Uncaught Error: Call to undefined function is_blog_installed() in /home/ptecom/public_html/wp-includes/load.php:755 Stack trace: #0 /home/ptecom/public_html/wp-settings.php(159): wp_not_installed() #1 /home/ptecom/public_html/wp-config.php(91): require_once('/home/ptecom/pu...') #2 /home/ptecom/public_html/wp-load.php(50): require_once('/home/ptecom/pu...') #3 /home/ptecom/public_html/wp-blog-header.php(13): require_once('/home/ptecom/pu...') #4 /home/ptecom/public_html/index.php(7): require('/home/ptecom/pu...') #5 {main} thrown in /home/ptecom/public_html/wp-includes/load.php on line 755

Warning: call_user_func_array() expects parameter 1 to be a valid callback, function 'wp_ob_end_flush_all' not found or invalid function name in /home/ptecom/public_html/wp-includes/class-wp-hook.php on line 307