Keep getting
We encountered an error (token mismatch). This probably means that the page you were using expired. Please try again.
It happens right after I confirm the google account I want to use on the Obi config page. Seems like an authentication issue between google and Obi.
Figured it out. I use the Vivaldi as my web browser. I switched back to Firefox and it work. Looks like the obihai website isn't compatible with the newer vivaldi browser even though it is chromium based.
Yup, lots of things still don't work with Vivaldi yet. It will take some time.