NodeRed 1.0 reverse proxy configuration with Apache 2.4

nodered-ssl.conf

<IfModule mod_ssl.c>
        <VirtualHost _default_:443>
                ServerName node.yourdomain.com
                ServerAdmin webmaster@localhost

                DocumentRoot /var/www/html # this does not matter
                
                ErrorLog ${APACHE_LOG_DIR}/error.log
                CustomLog ${APACHE_LOG_DIR}/access.log combined
                
                SSLEngine on
                <FilesMatch "\.(cgi|shtml|phtml|php)$">
                                SSLOptions +StdEnvVars
                </FilesMatch>
                <Directory /usr/lib/cgi-bin>
                                SSLOptions +StdEnvVars
                </Directory>
                
                SSLCertificateFile      /etc/letsencrypt/live/node.yourdomain.com/fullchain.pem
                SSLCertificateKeyFile /etc/letsencrypt/live/node.yourdomain.com/privkey.pem
                Include /etc/letsencrypt/options-ssl-apache.conf
                
                SSLProxyEngine On
                SSLProtocol TLSv1.2 -TLSv1.1

                Define NodeRedURL "/nodered/" # Use your desired location

                <Location ${NodeRedURL}>
                                RewriteEngine on
                                RewriteCond %{HTTP:Upgrade} ^WebSocket$ [NC]
                                RewriteCond %{HTTP:Connection} Upgrade$ [NC]
                                RewriteRule .*/(.*) "ws://localhost:1880/$1" [P,L]

                                ProxyPreserveHost On
                                ProxyRequests Off
                                ProxyPass http://localhost:1880/
                                ProxyPassReverse http://localhost:1880/
                </Location>
        </VirtualHost>
</IfModule>

Thanks for sharing!
ProxyRequests Off resulted in ProxyRequests not allowed in <Location> context; removing this line fixed it. Apache/2.4.56 on Debian Bullseye.