I have created a share function inside a (@Composable)

     that call Intent(Intent.ACTION_SEND)

the intent send without problem my file but the issue crash my app.
All my class and object implements Parcelable and Serialized, the problem is that I can not find the LinkedHashSet that cause the issue.

Gemini can not help me and I tried to isolate the issue without result

    fun createKmlFile(context: Context, kml: String, trailName: String): File? {
        try {
            // crea la directory kml_files nella cache dell'app se non esiste già,
            //  e poi salva il file trail.kml all'interno di quella directory
            val cacheDir = context.cacheDir
            val kmlDirectory = File(cacheDir, "kml_files")

            // Crea la directory se non esiste
            if (!kmlDirectory.exists()) {
                kmlDirectory.mkdirs()
            }
            val file = File(kmlDirectory, "$trailName.kml")
            val fileWriter = FileWriter(file)
            fileWriter.write(kml)
            fileWriter.close()
            return file
        } catch (e: Exception) {
            Log.e("Vagabondo", "Error creating KML file", e)
            return null
        }
    }

    fun shareTrail(kml: String, trailName: String, context: Context) {
        val kmlFile = createKmlFile(context, kml, trailName)
        if (kmlFile != null) {
            val kmlUri = FileProvider.getUriForFile(
                context,
                "${context.packageName}.fileprovider",
                kmlFile
            )
            Log.d("Vagabondo", "created kml uri: $kmlUri")
            val sendIntent = Intent(Intent.ACTION_SEND).apply {
                type = "application/vnd.google-earth.kml+xml"
                addFlags(Intent.FLAG_GRANT_READ_URI_PERMISSION)
                addFlags(Intent.FLAG_ACTIVITY_NEW_TASK)
                putExtra(EXTRA_STREAM, kmlUri)
            }
            launcher.launch(sendIntent)
        }
    }

FATAL EXCEPTION: main Process: net.xxxxxxx,  PID: 10249 android.os.BadParcelableException:  Parcelable encountered IOException writing serializable object (name = java.util.LinkedHashSet)  at android.os.Parcel.writeSerializable( Parcel. java: 2797)  at android.os.Parcel.writeValue( Parcel. java: 2563)  with tag AndroidRuntime

Thank you in advance to help me please!