Nest failure with 0.79

I upgraded to 0.79 today, and my Nest integration has stopped working. Nothing else has changed, but I now get this message:

ERROR (SyncWorker_1) [homeassistant.components.nest] Connection error while access Nest web service: Authorization failed

I tried deleting my nest.conf file but that had no effect.

Any ideas? Thanks for your help.

Remove your nest config from UI -> Configuration -> Integration and try to add it back from same place.

nest.conf is not used anymore since several release ago.

Thanks, I went thorough the configuration again and it came back up.