If you are a new beginner in flutter and get intimidated by error similar to this.

Don't worry. You are not alone.

The solution to this is add textDirection: TextDirection.ltr

And it will work.

See below.

void main() {
  runApp(
    Container(
      color: Colors.blue,
      child: const Text(
        "Nimish",
        textDirection: TextDirection.ltr,
        textAlign: TextAlign.center,
      ),
    ),
  );
}