Looking through the front grill, I think I see the yellow lever that is in your picture. I tried to move it both left and right with a screw driver, but did not pop open. Not sure if that is it, unable to do outside, or there is also another latch. Just found out today that the baby car seat is in there, so not taking the baby out today... I will retry all the doors, which I have done multiple times. Thanks everyone for your feedback!