Website is not available: Syntax error on line xxx of /etc/httpd/conf/httpd.conf

Symptoms

1. Website example.com is unavailable.

2. The following error appears in Plesk:

   PLESK_ERROR: httpd: Syntax error on line xxx of /etc/httpd/conf/httpd.conf: Syntax error on line yyy of /etc/httpd/conf.d/zz010_psa_httpd.conf: Syntax error on line zzz of /etc/httpd/conf/plesk.conf.d/webmails/example.com_webmail.conf

   or

   PLESK_ERROR: httpd: Syntax error on line xxx of /etc/httpd/conf/httpd.conf: Syntax error on line yyy of /etc/httpd/conf.d/deflate.conf

3. The following error are shown in journalctl log:

   # journalctl -u httpd
   systemd[1]: Starting The Apache HTTP Server...
   httpd[886]: httpd: Syntax error on line xxx of /etc/httpd/conf/httpd.conf: Syntax error on line yyy of /etc/httpd/conf.d/deflate.conf

Cause

Incorrect Apache webserver configuration.

Resolution

1. Connect to the server via SSH.

2. Execute the following command:

   # plesk repair web -server

3. In case it does not help - open file /etc/httpd/conf/httpd.conf with a text editor.

4. Remove/comment line "xxx" mentioned in the error.