My Daughter has one, same thing happens to her sometimes. Her's is soon fixed, Dad just starts the engine, and slowly, thats slowly moves through all the gear positions, allowing it to be in each position for 20/30 seconds, then when I get to L, I go back all the way through......and the light has always reset.
Guess the oil level is correct, with the correct oil, which has been changed with the filter within the last 2 years..............
If so, fingers crossed it works for you.
Cheers Qube O.