Getting error when downloading to public location on api 28+

[akk7777]

When trying to download to public folders using

destinationInExternalPublicDir: {
        dirType: "Downloads/",
        subPath: "file.pdf"
}

Showing this error
java.lang.IllegalStateException: Not one of standard directories: Downloads

[Umfi]

With API level 29 only the following paths are allowed.

            Environment.DIRECTORY_MUSIC,
            Environment.DIRECTORY_PODCASTS,
            Environment.DIRECTORY_RINGTONES,
            Environment.DIRECTORY_ALARMS,
            Environment.DIRECTORY_NOTIFICATIONS,
            Environment.DIRECTORY_PICTURES,
            Environment.DIRECTORY_MOVIES,
            Environment.DIRECTORY_DOWNLOADS,
            Environment.DIRECTORY_DCIM,
            Environment.DIRECTORY_DOCUMENTS,
            Environment.DIRECTORY_AUDIOBOOKS,

More details can be found here: https://developer.android.com/reference/android/os/Environment#getExternalStoragePublicDirectory(java.lang.String)

So just replace dirType: "Downloads/", with dirType: "Download" and the file should be stored in the public downloads folder.