My car suddenly stopped working and won't move, even though the engine starts completely normal. Whenever I try to shift gears, the corresponding gear indicator light on the dashboard—whether it's P, R, N, or D—just flashes continuously and nothing happens. There is absolutely no forward or reverse engagement at all. Interestingly, the accelerator works perfectly and the engine revs fine when the shifter is in Park or Neutral, but it does absolutely nothing when I put it in Drive or Reverse. It seems like the transmission has gone into problems.

When vehicle is switched off and key removed from ignition the dash lights flicked

Interior lights flicker on & off when vehicle is locked. Passenger front and rear door window switch light off