Hi @kirankolli,
I see in your Apache error log the next messages
[Tue Nov 05 08:12:02.825342 2019] [proxy_fcgi:error] [pid 29541:tid 140415281780480] [client 52.8.215.203:33162] AH01071: Got error 'PHP message: PHP Fatal error: Uncaught Error: Call to undefined function get_header() in /opt/bitnami/apps/wordpress/htdocs/wp-content/themes/Divi/index.php:1\nStack trace:\n#0 {main}\n thrown in /opt/bitnami/apps/wordpress/htdocs/wp-content/themes/Divi/index.php on line 1\n'
[Tue Nov 05 14:59:29.873327 2019] [proxy_fcgi:error] [pid 30499:tid 140415063570176] (70007)The timeout specified has expired: [client 203.133.170.221:32922] AH01075: Error dispatching request to : (polling)
It looks like one of your themes had an error and some hours later your connection between Apache and PHP-FPM stopped working or it took too long. Can you ensure that PHP-FPM is running? Can you check the error with the theme? I have not being able to reproduce your issue in a fresh new Bitnami WordPress instance.
sudo /opt/bitnami/ctlscript.sh status
If you find that any process is not running, start them with
sudo /opt/bitnami/ctlscript.sh start
Regards,
Gonzalo