Ecobee offline and cannot reconnect

So my ecobee went offline a few days ago and I cannot reconnect it or its two occupancy/temperature sensors.

The thermostat works fine using the ecobee app but in SmartThings and ActionTiles it is dead in the water. Trying to reconnect by adding back the ecobee credentials I get the following from the Classic app (in the V3 app it is a shorter message but essentially the same problem).

Is this the ecobee problem that occurs every few months that I have been reading about?

Hi, did you try to unselect the ecobee tstat from all your automation (routines, smartapps, scenes) and remove ecobee connect from your smartapps, and re-start from scratch?

I don’t have any issue with My ecobee DTH…

You should investigate…

I have done everything short of deleting it and reinstalling. That is next.

Did you get it connect? It did finally tell me that my credentials had changed in a firmware update. I did the new sms code for verification on my phone and on the website, but still won’t connect. I rebooted all devices without any luck.

I used the device handlers from SANdood in GitHub and all seems to be working for what I need.