Yamaha Musiccast setup dificulties

I just purchased a nice new Yamaha Digital Sound Projector YSP-2700 and I am trying to connect it to Musiccast app on my iPhone 7 but I keep getting the following message: “Setup failed. Please restart setup. (-10305)”. Can anyone help me with this? Thank you in advance.

I can’t see how this is related to Home Assistant. Could you please explain?