So what I did was create a new instance in multimc, installed the latest version of fabricloader, fabricapi, modmenu, and now-playing, and started it up. No settings were changed, and music played, but no popup ever showed up, and there's no errors/info related to the mod in the log.
Linux pc-name 4.19.0-6-amd64 #1 SMP Debian 4.19.67-2+deb10u2 (2019-11-11) x86_64 GNU/Linux
Edit: Apparently you need the subtitles to be on for it to work.
The SuntitlesHud listner is only registered while subtitles are on, and therefor SubtitlesHud's onSoundPlayed isn't ran
So what I did was create a new instance in multimc, installed the latest version of fabricloader, fabricapi, modmenu, and now-playing, and started it up. No settings were changed, and music played, but no popup ever showed up, and there's no errors/info related to the mod in the log.
Linux pc-name 4.19.0-6-amd64 #1 SMP Debian 4.19.67-2+deb10u2 (2019-11-11) x86_64 GNU/Linux
Edit: Apparently you need the subtitles to be on for it to work.
The SuntitlesHud listner is only registered while subtitles are on, and therefor SubtitlesHud's onSoundPlayed isn't ran