If the device in question is brand new, then a language selection can first be made. There are several options available in the other steps:
The "Offline" option does not offer any online functions and is intended for people who do not want to use a smartphone and/or computer.
The "Online" > Wi-Fi" option performs a complete registration using a Wi-Fi network and the online portal.
The "Online > Smartphone" option allows full registration using your Android or iOS Smartphone.
Choose one of the options and follow the instructions of the eBike Connect app on the Nyon. If you select the option via Wi-Fi and have registered, then you can add your Nyon under eBike System/Add new eBike device. You will receive a PIN code that you can then enter on your Nyon.