Pomodoro clock 28/29, #Timer - 12 error

Hello. I need help with Pomodoro clock. I pass all tests except of #Timer - 12.
Error is: Timer has reached zero but didn’t switch to Break time: expected ‘Session’ to not equal ‘Session’.
VIsually all okay, but it cannot pass. What is wrong with my code?

codepen link: https://codepen.io/adjsky/pen/ExYvjRx (i do not know why audio isn’t working, so i’ll link github site).
gtihub: https://adjsky.github.io/pomodoro-clock/ (here is 28/29).