Welcome to the forum its a great place to get your questions answered. It sounds like the pin has broken or come out of the slot take the operator apart by first removing the handle and you may be able to fix it.
Jake my sidekick (yellow Lab) 10/04 - 05/20
2017 RAM 2500 CC 4X4 Cummins Diesel
2016 Flagstaff 26 FKWS
AF&AM & El Korah Shrine of Idaho