Ginge

I bought my first Subaru yesterday, and I totally love it. Well, until I tried to get lunch today; it won't start. I have some experience with car repair, and it doesn't seem to be a mechanical problem. This thought is reinforced by the security light blinking once every 4 seconds while it is disarmed. It seems to me that it might be the immobilizer. I don't know how I could have triggered this. After parking it in my driveway this morning, I turned the car off and back to On (but not started) in order to pair my iPhone. This is the only thing I have done between when it ran and now. I don't like cursing a new car that I just fell in love with. Please help!