Apache2 virtual host website redirecting users to router configuration page [closed]

Question

I am running apache2 on Linux Mint Debian Edition 4.0. I am an apache newbie. I have setup a virtual host to point to my url. I am using dynu.com for virtual DNS redirection using the ddclient program to update dynu. When I try to bring up my url (markmhart.com) in any browser, instead of my index page I get the router configuration page. The webDAV configurations I have setup in the virtual host don't work. Here is my virtual host definition:

<VirtualHost *:80>
        ServerName markmhart.com
        ServerAlias www.markmhart.com www.markmhart.us markmhart.us
        ServerAdmin webmaster@localhost

        DocumentRoot /var/www/markmhart.com/web/html
        <Directory "/">
                Options FollowSymLinks
                AllowOverride None
        </Directory>
        <Directory /var/www/markmhart.com/web/html/>
                Options Indexes MultiViews FollowSymLinks
                AllowOverride All
                Order allow,deny
                allow from all
                Require all granted
        </Directory>

        Alias /webdav /var/www/markmhart.com/web

        <Location /webdav>
                DAV On
                Options Indexes MultiViews FollowSymLinks
                AuthType Basic
                AuthName "webdav"
                AuthUserFile /var/www/markmhart.com/passwd.dav
                Require valid-user
        </Location>

        Alias /media /media/mark/media

        <Location /media>
                DAV On
                Options Indexes MultiViews FollowSymLinks
                AuthType Basic
                AuthName "media"
                AuthUserFile /var/www/markmhart.com/passwd.dav
                Require valid-user
        </Location>
        
        Alias /music /media/mark/Music

        <Location /music>
                DAV On
                Options Indexes MultiViews FollowSymLinks
                Order allow,deny
                allow from all
                require all granted
        </Location>

        ErrorLog /var/log/apache2/markmhart.com-error.log
        LogLevel warn
        CustomLog /var/log/apache2/markmhart.com-access.log combined
        ServerSignature On

</VirtualHost>

I did a wget --spider with the following results:

wget --spider -S markmhart.com
Spider mode enabled. Check if remote file exists.
--2020-08-02 14:32:37--  http://markmhart.com/
Resolving markmhart.com (markmhart.com)... 47.156.192.189
Connecting to markmhart.com (markmhart.com)|47.156.192.189|:80... 
connected.
HTTP request sent, awaiting response... 
  HTTP/1.1 200 OK
  Content-Type: text/html; charset=UTF-8
  Cache-Control: no-store, no-cache, must-revalidate, post-check=0, 
  pre-check=0
  Pragma: no-cache
  CONTENT-LANGUAGE: en
  Date: Sun, 02 Aug 2020 21:32:37 GMT
  Server: lighttpd/1.4.39
Length: unspecified [text/html]
Remote file exists and could contain further links,
but recursion is disabled -- not retrieving.

I don't know why it is showing lighttpd as the server - I'm using apache2, and lighttpd has never been installed on this particular computer, unless the router itself is using lighttpd (Linksys AC5400 - EA9500).

My HOSTS file:

127.0.0.1   localhost markmhart-com
192.168.1.105   markmhart.com www.markmhart.com markmhart.us www.markmhart.us jenniahart.com www.jenniahart.com
# The following lines are desirable for IPv6 capable hosts
::1     localhost ip6-localhost ip6-loopback   
fe00::0 ip6-localnet
ff00::0 ip6-mcastprefix
ff02::1 ip6-allnodes
ff02::2 ip6-allrouters 
ff02::3 ip6-allhosts

I tried installing DNS server but have equivalent results. Web page and DAV data work on local machine, but router configuration page shows up on others. Do I need to alter settings in my router?

Thanks in advance for your help.