plugins – Restoring self-hosted website after configuration causes no response: ERR_CONNECTION_TIMED_OUT

I am comparatively new to internet improvement, and I’ve arrange a self-hosted (LAMP) WP website. After one too many configuration modifications I broke the location. Apache error logs are clear as to the place and when issues went mistaken, however I am undecided find out how to right the problem.

Any enter on what the following troubleshooting steps could be?

Thanks for any path.

1. [Wed Sep 14 09:28:38.141063 2022] [php:warn] [pid 38822] [client 173.68.17.120:49300] PHP Warning: Try to learn property “post_type” on null in /var/www/liquidmodernlife.ddns.web/wp-content/plugins/wordpress-seo/src/integrations/third-party/elementor.php on line 154, referer: https://liquidmodernlife.ddns.web/wp-admin/publish.php?publish=541&motion=elementor

sh: 1: /usr/sbin/sendmail: not discovered

2. [Wed Sep 14 21:21:25.401592 2022] [mpm_prefork:notice] [pid 1152] AH00170: caught SIGWINCH, shutting down gracefully

3. [Wed Sep 14 21:23:27.243231 2022] [mpm_prefork:notice] [pid 1196] AH00163: Apache/2.4.52 (Ubuntu) OpenSSL/3.0.2 configured — resuming regular operations

4. [Wed Sep 14 21:23:27.329219 2022] [core:notice] [pid 1196] AH00094: Command line: ‘/usr/sbin/apache2’

sh: 1: /usr/sbin/sendmail: not discovered

5. [Thu Sep 15 00:00:33.180904 2022] [mpm_prefork:notice] [pid 1196] AH00171: Sleek restart requested, doing restart
   AH00558: apache2: Couldn’t reliably decide the server’s absolutely certified area identify, utilizing 127.0.1.1. Set the ‘ServerName’ directive globally to suppress this message