Fujitsu Airstage app

Good morning everyone. I am opening this topic because the application in question does not work properly. Installed on iPhone 14 Pro at the end of the product registration, i.e. a Fujitsu air conditioner, it closes and crashes. It works until the wifi network is connected, then at the last step, i.e. conclude registration, it crashes. Can I kindly have some help on this or if there is a different way to register the devices, thanks?