The site down many time, check WHM server status, Apache server down.
Memory and Disk Usage OK
Is may be error by modify header information ?
How to fix it?
Warning: Cannot modify header information –
headers already sent by (output started at /home/wpmysite/public_html/wp-content/plugins/alphabetic-pagination/functions.php:330) in /home/wpmysite/public_html/wp-content/plugins/stop-spammer-registrations-plugin/stop-spammer-registrations.php on line 93