What does Immobiliser malfunction message on a Ford Kuga?

I recently had a non- start with my Kuga and a message that said "Immobiliser malfunction. Service required". Engine would not start and brake pedal was hard to press. I went back to " square 1" a couple of times exiting and locking the car as usual then unlocking etc. After a few cycles the car started as normal and has been ok ever since. I had the problem checked by a Ford dealer but nothing could be found. Their techincal explanation was that it was a glitch. Can anyone be a bit more helpful?

If they made Back to the Future nowadays what car would you use as the time machine?

Don't just pick a car that reminds you of the DeLorean that's not the premise of the question really. Imagine a cars at maybe just something that nobody would be expecting as a time machine this does not mean pick a Lamborghini and Maserati a Ferrari or any other Italian car.

Like honestly my choice was something that nobody would be expecting an old Ford f600 just because I thought that nobody would be expecting that and it be kind of funny especially if it had like a really hard stick shift or something