According to the Admin Documentation on GitHub i tried to install the app.
ejabberd works fine, i can connect with Pidgin.
I can open the ejabberd administration at https://localhost:5280/admin/ and the bosh url at https://localhost:5280/http-bind/ with Firefox.
I can’t connect to the BOSH url with the Nextcloud server
BOSH url with reverse proxy
http://localhost/http-bind/
gives me a status code 500 server error all the time
ProxyPreserveHost On
ProxyRequests Off
ProxyPass /http-bind/ https://localhost:5280/http-bind/
ProxyPassReverse /http-bind/ https://localhost:5280/http-bind/
a2enmode proxy proxy_http
service apache2 restart