Internet connection is not valid. Which can be happening due to the several basic reasons.

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Google wifi orange light. You can hold the microphone button to reset google home as explained in this guide. Disconnect power from all of your network devices including your modem and any google nest wifi or google wifi devices. Mine only get rebooted during the now quarterly firmware updates. Router settings are incorrect. At the same time the led lights countdown reducing number of led lights as shown below. Your wifi point is registered and all is.
Solid green or white. But what does that cool looking horizontal light across the middle of the google wifi mean. Wifi point is factory resetting itself. No they dont need to be reset sometimes. When the microphone on nest wifi point is off a glowing orange light will appear under the device. Instead of using a single router to try and squirt wi fi all over your house you use two three or more units to provide blanket coverage.
Once factory data reset fdr starts the led light color will change to orange. When its done the. You can choose to turn off this glowing orange. Google wifi is one of the new mesh router set ups. Generally orange light on the router shows the issues related to the internet. If its the 2ndary unplug it and bring it right next to the primary and see if it still occurs.
Orange led usually refers to the primary point and means no internet but your post hints that its a 2ndary point. The light will turn solid teal once the wifi point is online. Set up the wifi point in app. Turn off the mute light on the nest wifi point. Wifi point is offlinelight is orange there are few different things that can cause network problems for your google nest wifi or google wifi devices. Follow these troubleshooting steps to fix.
Wait until all of the led lights on the devices you unplugged are off. This can take up to 10 minutes.