First of all, welcome to the Homey Community!
To make sure you are aware of the forum rules, please read the Welcome to the forum post here.
What type of phone do you use?
What Network / SSID is your phone connected to?
You should connect to the HomeySetup-abc123 network and despite no Internet connection keep it and turn back to this screen in the Homey app.
Then you should be able to connect your Homey to your own network/SSID.
