Need new eyes to look at my JQuery Pomodoro Clock please

This is my first project where I tried to use JQuery. I’m not really understanding why the FCC suite isn’t reading my clock correctly. I’ve gone over it a bunch and tried different methods and haven’t had success. I’m very interested in the underlying “why” I’m getting these errors as it appears to me that the clock should pass these tests.

#10. Pomodoro has started but time displayed is not changing: expected ‘00’ to not equal ‘00’.
#12 and #14. Timer has not reached 00:00.
#13. Timer has reached zero but didn’t switch to Break time: expected ‘Session’ to not equal ‘Session’.
#15. Cannot read property ‘1’ of null.

#1. Timer has not reached 00:00.