Yamaha Gas Golf Cart won't go into reverse

Hello,

I have a little suburb street machine, a 2017 Yamaha Gas that has given me no problems until yesterday. I got on it to run to the local gas station and it wouldn't go into reverse. The screeching backup sound comes on, but it is almost like its stuck in neutral, or never engages. Forward works fine.

Where should i check first. It has the lever right beside the engine, not a flip button.