WordPress playlist shortcode mysteriously stopped working

Have you already solved this? Because I see the generated source code, not the shortcode, so I can listen to the playlist.

Yes, the source code is there, but if you view the page only a single mp3 player appears and it does nothing. If you’re seeing a full playlist that is playable, is it possible to post a screenshot?

Ah, now I see that I can see the player and the list of mp3 files, but the player does not recognize them. I can only play the files individually in the browser.

Reason seems to be that the wp-playlist script is missing with you. You have a custom theme which is why it is difficult to judge at which point it hangs. With the twentytwentyone-theme the wp-playlist-script creates an output via mejs-audio which plays the files one after the other. This is completely missing with you. Either this is a setting in your theme or it is missing.

You say this happens suddenly. What did you do before? Maybe you did an update of wordpress?

Also a tip would be to deactivate all plugins and see if it works then. Because also plugins can suppress the loading of the necessary scripts.

It was working perfectly until very recently. I’m guess it was due to a WordPress update. The theme is a custom theme built on the Underscores starter theme. If you know of some script I can add to the theme that would make the player work again, that would be greatly appreciated.

I changed themes to twentytwentytwo and deactivated all plugins. Still not working.

Solved! Somehow one of the MP3s in the playlist disappeared from the Media Library. That caused the whole playlist to not display.