Can’t use current WiFi to setup home pod

• HomePod uses the Wi-Fi network that your iOS or iPadOS device is connected to. Use your iOS or iPadOS device to forget the Wi-Fi network, then join the network again. 
• Personal Hotspots might work, but aren't recommended.
• If you're using an 802.1X Wi-Fi network, learn which networks are supported and how to connect to them. 
• HomePod doesn't support public or subscription networks with sign-in requirements. These networks are often in places like businesses, schools, dorms, apartments, hotels, and stores. 

See: if you can't set up HomePod.

Set up and use HomePod - Apple Support