Trying to reverse proxy, setting baseurl results in web error

[BenJeremy]

You also updated your Apache config?

Can you share your Apache config with us?  Censor the domains.

Code:

# The ServerName directive sets the request scheme, hostname and port that
# the server uses to identify itself. This is used when creating
# redirection URLs. In the context of virtual hosts, the ServerName
# specifies what hostname must appear in the request's Host: header to
# match this virtual host. For the default virtual host (this file) this
# value is not decisive as it is used as a last resort host regardless.
# However, you must set it for any further virtual host explicitly.
#ServerName www.example.com

ServerAdmin webmaster@localhost
DocumentRoot /var/www/html

# Available loglevels: trace8, ..., trace1, debug, info, notice, warn,
# error, crit, alert, emerg.
# It is also possible to configure the loglevel for particular
# modules, e.g.
#LogLevel info ssl:warn

ErrorLog ${APACHE_LOG_DIR}/error.log
CustomLog ${APACHE_LOG_DIR}/access.log combined

# For most configuration files from conf-available/, which are
# enabled or disabled at a global level, it is possible to
# include a line for only one particular virtual host. For example the
# following line enables the CGI configuration for this host only
# after it has been globally disabled with "a2disconf".
#Include conf-available/serve-cgi-bin.conf


ServerName xxxxxxxx.no-ip.org
SSLCertificateFile /etc/letsencrypt/live/xxxxxxxx.no-ip.org/fullchain.pem
SSLCertificateKeyFile /etc/letsencrypt/live/xxxxxxxx.no-ip.org/privkey.pem
Include /etc/letsencrypt/options-ssl-apache.conf
<Location /sabnzbd>
    order deny,allow
    deny from all
    allow from all
    ProxyPass http://localhost:8060/sabnzbd
    ProxyPassReverse http://localhost:8060/sabnzbd
</Location>

<Location /sonarr>
    ProxyPreserveHost on
    ProxyPass http://127.0.0.1:8989/sonarr connectiontimeout=5 timeout=300
    ProxyPassReverse http://127.0.0.1:8989/sonarr
</Location>

<Location /lidarr>
    ProxyPreserveHost on
    ProxyPass http://127.0.0.1:8686/lidarr connectiontimeout=5 timeout=300
    ProxyPassReverse http://127.0.0.1:8686/lidarr
</Location>

<Location /readarr>
    ProxyPreserveHost on
    ProxyPass http://127.0.0.1:8787/readarr connectiontimeout=5 timeout=300
    ProxyPassReverse http://127.0.0.1:8787/readarr
</Location>

<Location /radarr>
    ProxyPreserveHost on
    ProxyPass http://127.0.0.1:7878/radarr connectiontimeout=5 timeout=300
    ProxyPassReverse http://127.0.0.1:7878/radarr
</Location>

<Location /jellyfin/socket>
    ProxyPreserveHost On
    ProxyPass "ws://127.0.0.1:8096/jellyfin/socket"
    ProxyPassReverse "ws://127.0.0.1:8096/jellyfin/socket"
</Location>
<Location /jellyfin>
    ProxyPass "http://127.0.0.1:8096/jellyfin"
    ProxyPassReverse "http://127.0.0.1:8096/jellyfin"
</Location>

This is exactly out of the Jellyfin docs.

As I said, it also fails to work locally after changing the base url to /jellyfin
The settings page, after saving the change, cycles then displays redirects to the same location, with the new baseurl prefixed... and the chrome error.

The home page goes from:

Code:

http://mediaserver.local:8096/web/index.html#!/home.html

  (Working)

to:

Code:

http://mediaserver.local:8096/jellyfin/web/index.html#!/home.html

  (Not Working)

So it's not a problem with the Apache configuration, I think. If the local is failing to display a web page, the reverse proxy will simply echo that.