Mattermost Installed, but not loading in browser

Troubleshooting
12

Hello again! Here is my SSL Apache Configuration file, slightly redacted though.

<IfModule mod_ssl.c>
<VirtualHost *:443>
  # If you're not using a subdomain you may need to set a ServerAlias to:
  # ServerAlias www.mydomain.com
  ServerName <REDACTED>
  ServerAdmin [REMOVED]@<REDACTED>
  ProxyPreserveHost On
  DocumentRoot /opt/mattermost
  # For the IP logging we run on all domains/subdomains, header 
  # provides real user IP when behind Cloudflare
  RemoteIPHeader CF-Connecting-IP


# Mattermost Config

        # Set web sockets
        ProxyRequests Off
        RewriteEngine On
        RewriteCond %{REQUEST_URI} ^/api/v3/users/websocket [NC,OR]
        RewriteCond %{HTTP:UPGRADE} ^WebSocket$ [NC,OR]
        RewriteCond %{HTTP:CONNECTION} ^Upgrade$ [NC]
        RewriteRule .* ws://127.0.0.1:8065%{REQUEST_URI} [P,QSA,L]
        RewriteCond %{DOCUMENT_ROOT}/%{REQUEST_FILENAME} !-f
        RewriteRule .* http://127.0.0.1:8065%{REQUEST_URI} [P,QSA,L]
        RequestHeader set X-Forwarded-Proto "https"

  <Location /api/v4/users/websocket>
    Require all granted
    ProxyPassReverse ws://127.0.0.1:8065/api/v4/users/websocket
    ProxyPassReverseCookieDomain 127.0.0.1 <REDACTED>
  </Location>

  <Location />
    Require all granted
    ProxyPassReverse https://127.0.0.1:8065/
    ProxyPassReverseCookieDomain 127.0.0.1 <REDACTED>
  </Location>

# End Mattermost Config

        #Custom Error Pages 
        ErrorDocument 401 /srv/<REDACTED>/error/401
        ErrorDocument 403 /srv/<REDACTED>/error/403
        ErrorDocument 404 /srv/<REDACTED>/error/404
        ErrorDocument 500 /srv/<REDACTED>/error/500

        #Block access to the .git folder from the webserver (Security Enhancement)
        RedirectMatch 404 /\.git

        Include /etc/letsencrypt/options-ssl-apache.conf
        SSLEngine on
        SSLVerifyClient require
        SSLVerifyDepth 1
   
        #Cloudflare Authenticated Origin Pull Certificate
        SSLCACertificateFile /root/origin-pull-ca.pem 
   
        #Domain name SSL Certs. configuration
        SSLCertificateFile /etc/letsencrypt/live/<REDACTED>/fullchain.pem
        SSLCertificateKeyFile /etc/letsencrypt/live/<REDACTED>/privkey.pem
</VirtualHost>
</IfModule>

I know there is a bit of extra stuff in there but I wanted to provide what I know is fully functional for me personally and my team. Does this help?

If you have any questions or encounter any issues, please don’t hesitate to ask them, I’m more than happy to help however I can!