After installing and configuring this module, I experience the following error while trying to link a new Google account:

Exception: Failed to connect to 2607:f8b0:4009:808::200d: Network is unreachable in DrupalOAuth2Client->get() (line 136 of sites/all/modules/oauthconnector/modules/oauth2/lib/DrupalOAuth2Client.inc).

I believe it is related to the proxy we use for outbound traffic. I attempted to set the proxy setting as a curl opt just before this call in the .inc file, but another error resulted (unable to get a valid token on line 44).

I do have the proxy_server/proxy_port conf setting set correctly in settings.php of the drupal site.

Any advise for how to resolve this error?

Thanks