Hi Todd,
It’s the first report of this sort I can remember seeing. Your ecobee:appkey is the same number of letters as mine (32).
I’ve only ever used ecobee:scope=smartWrite. The docs says smartRead should work for read-only access, though, if you want openHAB to only have read-only access.
Also, you don’t have to specify ecobee:tempscale=F because that’s the default, but it shouldn’t hurt or be at all relevant to this stage either.
I have to think that there is something incorrect about how you defined your app at the ecobee developer site. Perhaps more information about how you set it up, maybe even screenshots, could educate me on what you set up.
Another thing to try, but I doubt it will help at this early stage, is to stop the openHAB server, delete the Java Preferences file where any bad tokens could be stored (on Linux, this should work: rm -rf ~/.java/.userPrefs), and restart the openHAB server. But I don’t think you have any tokens yet…
Last, and very much least likely, is a problem at ecobee.com that is the root cause of the issue.
Let me know what you are able to see and I will try to help more.
John