Make sure the mic is not muted and the volume is loud enough.
Choose easy names such as Living Room, Bedroom, Home or Kitchen so that the Google Assistant can easily understand you. Try not to combine languages if the setup is executed in English.
If this does not resolve the problem, we recommend you try the following:
Delete the Google Home app from your phone or tablet.
Reset your soundbar
To restore the factory default settings, press "Options" > "Factory Reset" on the display of your soundbar or press and hold the reset button at the back side of the soundbar for about 20 seconds. The soundbar will restart and is ready to be reinstalled.
Reinstall the Google Home app and perform the setup preferably when your phone/tablet is connected to the faster 5 GHz WiFi home network.
If you have a standard provider router with a 2.4 GHz and 5 GHz home WiFi network, we recommend that you separate these two bands by giving the 2.4 GHz and 5 GHz networks each a separate SSID (network name) and password. To do this, you must log into the modem. If you are not sure how to do this, we recommend you contact your Internet provider, who will be able to assist you with this over the phone.
In the network section there's an article witch explains how this can be done manually. Afterwards, be sure to connect the phone or tablet to the faster 5 GHz home WiFi network before you run the setup again. If you have made changes to your network settings, make sure that all your devices are registered on the ‘new’ network and make sure to forget any other networks with which your phone/tablet was configured to connect automatically.
NOTE: Also please check out the article about preventing interference. If you are unable to easily maintain the wireless connection, the Citation Bar can also be connected directly to the network with an Ethernet cable.