Have experience coding for HotSpot on Android V6-7?

Problem to turn On HotSpot on Android 6+
It works on Android 4.4-5 but restricted on V6+.

Anybody having experience working with HotSpot on Android V6-7?

  /**
     * Turn On or Off wifi
     *
     * @param context
     * @param isTurnToOn
     */
    public static void turnOnOffWifi(Context context, boolean isTurnToOn) {
        WifiManager wifiManager = (WifiManager) context
                .getSystemService(Context.WIFI_SERVICE);

        if (isTurnToOn && isHotspotSupported() && isHotspotOn(context)) {
            turnOnOffHotspot(context, false);
        }

        wifiManager.setWifiEnabled(isTurnToOn);
        if(isTurnToOn){
            writeLog(context, "turn on WIFI");
        }else{
            writeLog(context, "turn off WIFI");
        }
    }

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We followed this tuto: http://omtlab.com/android-enable-disable-hotspot-programmatically/ made in 2014.

I do not get any error message. It just won't open the Hotspot.  Closing Wifi works however. (We close Wifi before we enable the HotSpot)