Why is TopAppBar navigationIcon's not a composable function?

My IDE is showing that navigationIcon is not a composable function. Other people are doing the same thing. I'm getting this error

@composable invocations can only happen from the context of an @composable function

@Composable
fun AppBar(onClick: () -> Unit){
    TopAppBar(
        title = "Princess World", 
        navigationIcon = { 
            IconButton(onClick = onClick) {
                Icon(imageVector = Icons.Default.Menu, contentDescription = null)
            } 
        },
    ) {}
}

I'm unable to use composable functions inside of title and navigation icon {}

@Composable
fun AppBar(onClick: () -> Unit){
   TopAppBar(title = { }, navigationIcon = { }) {

   }
}

You have to remove the final {}:

TopAppBar(
    title = { Text("Princess World") },
    navigationIcon = {
        IconButton(onClick = onClick) {
            Icon(imageVector = Icons.Default.Menu, contentDescription = null)
        }
    }
)

Using the {} you are trying to use the constructor with the attribute content: @Composable RowScope.() -> Unit that doesn't have the title and the navigationIcon attributes.