Insane American laws: Not telling the accused what he's accused of

One of the most fundamental cornerstones of a justice system, very much including and very prominently the American justice system, is that someone accused of a crime and being on trial because of it has the absolute legal and constitutional right to a defense, to present his case, to have legal representation if needed, and a fundamental part of this is that the accused needs to know exactly what he's being accused of and what the possible penalties for it are if he's found guilty.

This is, in fact, one of the very first steps in court trial procedure: An initial plea hearing where the accused (and his lawyer if he has one) is informed of exactly what he's being accused of, what the possible penalties are, and for him to enter a plea ("guilty", "not guilty", "no contest").

Except...

For some completely incomprehensible and insane reason judges are allowed to sign a so-called "protective order" that, get this, orders the court and all government officials to not reveal to the accused what exactly he is being accused of.

That's right, the judge can legally and literally declare that you will not be told what you are being accused of. You can be arrested and put on trial, and there will still be court hearings, and the trial will proceed, but you nor lawyer cannot know what you are being accused of.

This might not be the case all the way to the actual jury trial proper, but it does mean that a judge can issue a warrant for your arrest, the cops can arrest you, and they can put you in jail waiting for bond or trial, and you will have to go through several court proceedings and hearings... without ever being told what exactly you are being accused of, and thus you being unable to prepare your defense. Even the cops will not know and be unable to tell you what you are being arrested for. They just have the arrest warrant but no articulable crime.

Yes, it's exactly as insane as it sounds.

Needless to say, this is egregiously unconstitutional and also against international human rights. Yet, it's completely legal in the United States.