Older Kenmore oven- door locked by itself

Question

We have an older Kenmore gas/electric oven. The door locked during the night and it keeps making a clicking noise. Self-clean was not set. We unplugged it and it came right back on. On the LCD panel "lock" keeps flashing. Please help.

I have the same problem! The model number on ours looks like this: 911.3138819 (found on the inside of the door).
We can't use our oven.