Steering column locked for lr2

my land rover LR2 2008 model showing message on screen (STEERING COLUMN LOCKED), actually steering not locked but car is not starting at all, it is push button to start,
checked battery, fuses,starter by technician but in vain,
pl advice me if u have any idea,
your help is highly appreciated and expected.

Trying disconnecting the battery to reset the system, if that doesn't work it may need to be plugged into a diagnostic computer to see what's wrong.