I'm sure I have the same safe as you. I've had mine for several years. It has done the same thing to me at times. I just keep messing with it until it engages. It's the mechanical linkage inside that sucks. It's slips. If you can get it open tighten everything up inside. I did buy a big liberty safe a couple of years ago as my primary safe.. Ya it's a lot more ;money but worth it to me.
Thinking of selling the Cannon as I really don't have much in it now.
Good Luck.
