GMAIL API Connection issue

Hi Folks,
I am using bubble.io for the first time to make a web app which reads & analyzes your emails to provide certain insights.

I am using API connector plugin with following configuration

To try out the connection, I have placed a ‘login’ button and setup the workflow to start ‘sigup/login with API’ action upon ‘login’ button click.

In preview mode, I get redirected to google successfully and after selecting account, i come back on bubble but get this error

Not sure how to fix this.

Hello, did you finally manage to get it working? I would be grateful if you said that here.