I just had the same thing with mine, which happens when you close the door before reinserting the top. What happens is when you close the top first, there a red lever that needs to be pushed in by the lid. If you reverse this, you miss out on pushing that red tab and it ends up being a nightmare. To fix this, you need to moderately release the canister by pressing on the 1/2” lever at the bottom and moving the canister as much as you can, then, basically pry open the lid. It's terrifying and feels like you're going to break it, but it's just a ton of suction in the middle. Once you have the lid open, you should be able to pull up normally on the large red lever at the top and properly close it (top first, then lid).