Issue
Upon connecting to Google BigQuery from Tableau Desktop 2020.3 (and later) where a proxy server is configured, the following error occurs:Error: Couldn't connect to OAuth Server at localhost
Set an exception so that the proxy server will not be used for communicating with localhost via Internet Option in IE as described in the article below.
Tableau Fails To Connect to Amazon Athena through Proxy With Error Code 37CE01A3