25 + 5 Clock Audio is playing but does not pass audio test #1

I am trying the 25 + 5 clock javascript challenge. I use React and the timer seems to me to be working just fine like it should, but one test does not get passed:

User Story #26: When a countdown reaches zero (NOTE: timer MUST reach 00:00), a sound indicating that time is up should play. This should utilize an HTML5 audio tag and have a corresponding id="beep" .

The solutions on the other topics did not help me.

Here is the link to my codepen: https://codepen.io/philale/pen/JjvvmZx