However, if theres something wrong with the web link connection,Google Home wont connect to WiFi.
Therefore, they write lots of help posts on major forums, including Google Nest Community and Reddit.
(By the way, therere also users saying they cant establish a Wi-Fi connection to the Chromecast.)

How to Connect Google Home to WiFi
yo check the following things first.
How to Connect Google Home to WiFi during the initial setup?
How to connect Google Home Mini to WiFi?
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The steps are the same.
Could not communicate with your Google Home or Google Home Mini?
How to reconnect Google Home to WiFi?
Step 1: reboot WiFi router.
Step 2: restart Google Home app.
yo force close and relaunch the Google Home app installed on your Android/iOS equipment.
Step 3: reboot Google Home speaker or display.
If this failed, you might also have a go at turn Airplane Mode On and Off.
You should check the firmware of your router and see whether it should be updated.
You should reset connection options in Google Home app and the rig to see whether the problem persists.
If yes, yo have a go at reset Google Home rig to factory tweaks and see what happens.