Error when attempting to play an animation with sound

A few days ago, I was creating a 10-second animation in Adobe Animate using the HTML5 Canvas platform for my seatwork in school. First, I made the buttons, scripted them, and inserted sound into each of them so that it would play the sound once it is clicked. Then it worked at the time I tried to play the animation. Next, I inserted the sound into the animation itself. But when I played it, this is what showed up:

I tried making another one and I followed the same steps, but the error keeps displaying. Is this potentially a bug or is there something that has to do with the script which causes this error to appear?