The notification that “Something went wrong during setup” typically occurs when the product has difficulty joining the Wi-Fi network. Ensure your iOS device is connected to a 2.4 GHz network band using WPA or WPA2-PSK (AES) security. If you adjusted the network connection, attempt the setup again.
You can attempt to power the device on or off, and try the setup process again.
If after a power cycle the product re-joins your network, you can attempt setup again in the iDevices Connected app.
If you continue having issues please refer to the product’s manufacturer for more information on how to resolve the HomeKit setup failure.