I didn't know VLC provided scrobbling! Some more info I found while trying to debug this:

Find the settings for this in

• Tools -> Preferences
• In the bottom left under "Show Settings" click All
• Interface -> Control interfaces
  • Check Submission of played songs to last.fm
  • -> Audioscrobbler <--- settings located here

Scrobbler URL

The default value is audioscrobbler which makes me think it can use that protocol...

The value in this setting must be without protocol prefix. VLC also assumes protocol is http (can't use https)

IE my maloja endpoint is http://scrobble.myWebdomain.com then Scrobble URL starts with scrobble.myWebdomain.com

Scrobble Logs

Logging VLC output by running from CLI i get these results using maloja endpoints:

Using Audioscrobbler v1.2

scrobble.myWebdomain.com/apis/audioscrobbler_legacy as Scrobble URL

[foxx@foxx-arch ~]$ vlc
VLC media player 3.0.17.4 Vetinari (revision 3.0.13-8-g41878ff4f2)
[0000561cd695b550] main libvlc: Running vlc with the default interface. Use 'cvlc' to use vlc without interface.
[0000561cd69f8c30] main playlist: playlist is empty
[0000561cd6a631e0] audioscrobbler interface error: Authentication failed, handshaking again (HTTP/1.1 403 Forbidden
Connection: close
Content-Length: 11
Content-Type: text/html; charset=UTF-8
Date: Wed, 07 Dec 2022 20:28:18 GMT
Server: waitress

)

Using Audioscrobbler

scrobble.myWebdomain.com/apis/audioscrobbler as Scrobble URL

[foxx@foxx-arch ~]$ vlc
VLC media player 3.0.17.4 Vetinari (revision 3.0.13-8-g41878ff4f2)
[00005594beae9550] main libvlc: Running vlc with the default interface. Use 'cvlc' to use vlc without interface.
[00005594beb86c30] main playlist: playlist is empty
[00007f8dfc00e660] access stream error: HTTP 404 error
[00007f8dfc00e660] http stream error: error: HTTP/1.0 404 Not Found
[00005594bebf1310] main interface error: no suitable access module for `http://scrobble.myWebdomain.com/apis/audioscrobbler/?hs=true&p=1.2&c=vlc&v=3.0.17.4&u=dfdsf&t=1670444722&a=bdbaf4ca534bbb88e08e6ba7012f6136'

Sidenote: Looks like there is a patch to add listenbrainz protocol for VLC but it seems stuck in limbo:
vlc-devel PATCH Add module to submit listens to ListenBrainz.

@kitesi

This isn't a true solution for you but as a workaround: if you use linux you can use MPRIS with multi-scrobbler to scrobble from VLC to maloja. The MPRIS source is available on foxxmd/multi-scrobbler:develop docker image or develop git branch.

Thank you, I'll check it out!