Food saver is stuck shut

I experienced the same problem today. I forgot to reinstall the drip tray prior after cleaning it. I closed the Foodsaver back up and it got stuck in the closed position and would not open no matter how hard I tried. I would push the green tabs and attempt to rotate it as per the instructions and it still would not open. I was able to resolve the issue by taking a flat head screw driver and carefully prying a few inches in from the sides of the machine. More specifically, the drip tray is basically a rectangle catch basis with two half circles on either end. Place the screw driver at the location of the half circles and gently pry at the parting line where you would normally put the bags while pushing both the green tabs. Once the tray is reinstalled it should work fine. If your like me, you wont make this mistake again. Good luck!