Hello and welcome to Just Answer!
It sounds like something has happened to the WIN(wireless ignition node). This is the module that you insert your fobik(key) into.
Have you tried your other fobik to see if it works?
If you have tried your other fobik and it still doesn't work, I will need you to disconnect the battery negative cable for 30 seconds and re-connect and see if your fobik will turn.