Alarm went off now can't start car

[Tin cup]

Left my window open a bit my alarm went off so I when out switched it off and did my window up when out 20mins later to drive my car and the car won't start the warning light stays on the one with the zig zagged line ? Any clues

 

[Tin cup]

Got it started but I was trying on/off for about 45min dam immobilizer is like witchcraft