Pressing buttons errors on FCC script - "Drum Machine"

Despite it is working as intended, within the FCC script test, pressing buttons seems to not be working, and for this reason I get 3 errors in my project. Can anyone help me?

Drum Machine Project for Front End Libraries.

Code:
https://codepen.io/codingfl/pen/WNvMwYj

I tried to complete the challenges the simplest way as possible, so the code is very clean, if you have any tips on how different would you make it, please fell free to share.

What that supose to mean? Sorry, didn’t understand.

Can anyone help? Please.

It works fine for me. What errors are you getting?

Thats the point, it is working fine, but when you run the FCC script it doesn’t pass several tests.