your console screen shows network error - like your system does not allow you to connect to oauth2.googleapis.com
. Can you ping oauth2.googleapis.com
?
Not sure what you mean. Just create new project for your client_id. Other projects do not matter if present.
This is normal and actually a good sign that you are attempting to use your custom client_id which is not officially certified. You won't see it when using rclone default one, which we do not want.