It should be some audio of a doorbell. But if something is blocking this link, you would experience the problem shown in your screenshot. Opening the link directly may provide more information.
Since you reported that the problem occurs after being able to play some audio, can you go to elements.envato.com and browse around until the problem begins?
Then, try visiting the doorbell audio again, and refresh it for good measure. I do expect you to see something different when the players stop loading.
I opened the browser, played the songs, switched pages and the problem started.
I rang the link bell.
I went back to the songs, refreshed the page, it seems to have gone, but then the problem returns.
And now the play appears but when I play the song it doesn’t play.
It shows a darker gray in the song graphic, but it doesn’t play.
It’s very unstable and frustrating to want to listen and choose and not be able to.