Yeah, this one's common. The bin base won't open if the red bin release button isn't pushed down all the way.
- Hold the machine over a trash bin, pointing straight down.
- Firmly push the red bin release button all the way down. You'll feel it.
- The bin should slide down, cleaning the shroud as it goes, and the base will open.
If that didn't work: There might be a large debris jam. Try pressing the button while gently shaking the machine over the bin. Also, empty it before the dirt reaches the MAX line—overfilling can cause issues.
Heads up: To minimize dust, cover the bin tightly in a dust-proof bag while you empty it. Seal the bag tightly after.