myoware experiment not working.

I want to get a myoware v4 working as part of my project, based off the circuit here How To - Myoware Sensor LED - YouTube. The myoware and arduino board are working and the programme has no error messages, yet the LED doesn’t light up. Here are 2 pictures with to prove the myoware and programme are not the problem.
Why does the light not turn on when I attach the myoware than?

Why is the led lighting up even when the sensor is not connected to the muscle