Gsuite for Splunk logs error

I tried configuring the [GsuiteforSplunk][1] App. Configuration, authorization part and the google apps input all have been configured and saved. But I have issues receiving the logs in Splunk App. All I receive is the error logs. Can someone help me out here. If there is any documentation on the configuration, it would be additional help. Thanks in advance. [1]: https://splunkbase.splunk.com/app/3791/