Apache displays "Default Page" when using https://www.example but works for https://example

I am having trouble with my Apache config and cannot get it to serve up my main webapp when I enter the URL that includes WWW (https://www.example.com) but it works fine when I don't (https://example.com).

I have tried adding the individual lines:

• ServerAlias www.example.com
• ServerAlias *example.com

to all of the VirtualHosts but that made no difference.

From my tests I see the redirects work but I can only access the main site via certain URLs:

• http://www.example.com
• http://example.com
• https://example.com
• https://www.example.com

I was wondering if someone could help me solve this so I can hit my mainsite from any URL. Also I have to demo this site to a customer very soon and am scrambling for a solution!

Here is my Apache configuration:

000-default-conf

<VirtualHost *:80>
    Alias /static /home/user/project_1/static
    <Directory /home/user/project_1/static>
        Require all granted
    </Directory>

   ServerName example.com

   Redirect permanent / https://example.com/
</VirtualHost>

default-ssl.conf

<IfModule mod_ssl.c>
    <VirtualHost _default_:443>
        ServerAdmin webmaster@localhost

        DocumentRoot /var/www/html
        Alias /static /var/www/example.com/static

        <Directory /home/user/project_1/static>
            Require all granted
        </Directory>

        Alias /media /home/user/project_1/media
        <Directory /home/user/project_1/media>
            Require all granted
        </Directory>

        ...
        ...

        <Directory /home/user/project_1/mywebapp>
            <Files wsgi.py>
                Require all granted
            </Files>
        </Directory>

        WSGIDaemonProcess user python-home=/home/user/project_1/env_mywebapp python-path=/home/user/project_.......

        WSGIProcessGroup mywebapp
        WSGIScriptAlias / /home/user/project_1/mywebapp/wsgi.py

        ServerName      example.com

        SSLCertificateFile /etc/letsencrypt/live/example.com/fullchain.pem
        SSLCertificateKeyFile /etc/letsencrypt/live/example.com/privkey.pem

        Include /etc/letsencrypt/options-ssl-apache.conf
    </VirtualHost>
</IfModule>

le-redirect-example.com.conf (Created by let's encrypt certbot)

<VirtualHost _default_:80>
    ServerName example.com

    ServerSignature Off

    RewriteEngine On
    RewriteRule ^ https://%{SERVER_NAME}%{REQUEST_URI} [END,NE,R=permanent]

    ErrorLog /var/log/apache2/redirect.error.log
    LogLevel warn
</VirtualHost>

Thank you for your help!

[UPDATE]

Here's the output from running the command "curl -I"

root@host1:~# curl -I www.example.com
HTTP/1.1 301 Moved Permanently
Date: Mon, 16 Apr 2018 18:23:20 GMT
Server: Apache/2.4.18 (Ubuntu)
Location: https://example.com/
Content-Type: text/html; charset=iso-8859-1

root@host1:~# curl -I example.com
HTTP/1.1 301 Moved Permanently
Date: Mon, 16 Apr 2018 18:24:31 GMT
Server: Apache/2.4.18 (Ubuntu)
Location: https://example.com/
Content-Type: text/html; charset=iso-8859-1

root@host1:~# curl -I https://example.com
HTTP/1.1 200 OK
Date: Mon, 16 Apr 2018 18:25:23 GMT
Server: Apache/2.4.18 (Ubuntu)
Vary: Cookie,Accept-Encoding
X-Frame-Options: SAMEORIGIN
Set-Cookie: csrftoken=zxxxxxxxxxxxxxxxxxxxxxzBcrBOvUDUdxxxxxxxxxxxxxxxx; expires=Mon, 15-Apr-2019 18:25:23 GMT; Max-Age=31449600; Path=/
Content-Type: text/html; charset=utf-8

root@host1:~# curl -I https://www.example.com
HTTP/1.1 200 OK
Date: Mon, 16 Apr 2018 18:26:15 GMT
Server: Apache/2.4.18 (Ubuntu)
Last-Modified: Tue, 03 Jan 2017 02:48:33 GMT
ETag: "1234-12347b43...."
Accept-Ranges: bytes
Content-Length: 11321
Vary: Accept-Encoding
Content-Type: text/html