The blue light inside my bin doesn't light up. The bin is able to open and close in manual mode by pressing the button once to open, and another time to close. But in automode, the sensor only opens the lid. then a few seconds later while still open, it beeps quickly many times. I tried to long press the button to seal the bag and it beeps in a pattern beep2x, beep 4x, beep 4x. It's strange. I cannot find any article or in the manual what the error beep means and how to fix it.