No devices were found in your openhab account when linking to Google Home

[rpwong (Russ)]

Yes, you need to update to metadata.

OpenHAB app in Google Home uninstalled

The tagging method for Google Assistant was deprecated 1.5 years ago, but they were left in place to give time for people to move over to the metadata approach, ideally as they transitioned to OH3. The problem is that we don’t have a way of communicating this to all users, other than the community. So while it was big news when the change happened, there was no way to inform users who don’t check in on a regular basis. Unfortunately, we have to wait for them to come here and ask when it stops w…

It should work in 2.4 just fine.

FYI, if you upgrade to OH3, you can use the remote binding to connect to a second server running OH2, so that you can keep your old binding running.