Hi all first post here. I have a 2019 L3901 and yesterday the HST pedal stopped working, tractor won't go forward and wants to creep backwards when the brake is off. Was working flawlessly up to this point. I've checked my shifters and 4wd, all correctly positioned. Fluid is half full. Pedal will not depress to fwd position and will travel to reverse position. can't figure out what may cause this issue. Any ideas on what to look at?