@Paxtatochip
I had a similar problem. My Hue <-> Google link disappeared the other day and it won't let me re-add it. If I look at the Google Home app itself, all the lights appear offline. I've attempted to re-link the Hue account, and it seems like it works--everything logs in just fine, however, Phillips Hue never shows up in the "linked services" list. Other posters seem to have resolved the issue by unlinking and then re-linking the Hue account, but I wasn't able to do that because Hue wasn't in the list of "linked services" to begin with. So I decided to go the other way with troubleshooting and started investigating Hue. I logged in to the Hue webpage dashboard and clicked "My Phillips Hue System" from the left column, then selected my Hue bridge on the right. There were tons (30+) old stale devices and connections to the bridge so I deleted all of them except my cell phone and cell phone app. I tried again inside the Google Home app to re-link with no success. I went back to the Hue android app and found an option in Settings > Bridge settings at the bottom called "Clean up". I'm guessing this does a deeper cleaning than what I performed from the web dashboard. The first try it said it errored out for some reason, but I ran it again and it seemed to have went through. Note: this does not delete your lights/sensors, just any custom scenes and other junk you've added. I went back to the Google Home app and attempted to re-link. Huzzah! It now shows up in the "linked services" section. I flipped some of the lights off and on a couple times and then asked Google to dim all my lights and it worked.
Good luck--I hope this helps. 😎👍
m51
