Parse for Android: ParseInstallation.getCurrentInstallation().get(KEY_DEVICE_TOKEN) returns null

Parse for Android: Trying to get a device token in Parse but it keeps returning null. This code was working about 6 months back but lately have noticed this issue. Using the device token to subscribe to Parse later on. It just gets stuck in the while loop.

private static final String KEY_DEVICE_TOKEN = "deviceToken";
boolean isTokenReady = false;
while (!isTokenReady) {
    String deviceToken = (String) ParseInstallation.getCurrentInstallation().get(KEY_DEVICE_TOKEN);
    if (!StringHelper.isNullOrEmpty(deviceToken)) {
        subscribe(deviceToken);
        isTokenReady = true;
    } else {
        sleep(1000);
    }
}
ParsePush.subscribeInBackground("pushtoken_" + deviceToken);