Cannot configure Gmail

When I try to configure postman on step 3 (Outgoing Mail Server Hostname) I get a browser alert with the following content:

An unexpected error occurred {
    "readyState": 4,
    "responseText": "?{\"success\":false,\"data\":{\"hostname\":\"relay-hosting.secureserver.net\",\"hostname_domain_only\":\"secureserver.net\",\"port\":25,\"protocol\":null,\"secure\":null,\"mitm\":null,\"reported_hostname\":null,\"reported_hostname_domain_only\":null,\"message\":null,\"start_tls\":null,\"auth_plain\":null,\"auth_login\":null,\"auth_crammd5\":null,\"auth_xoauth\":null,\"auth_none\":null,\"try_smtps\":true,\"success\":false,\"transport\":\"\"}}",
    "status": 200,
    "statusText": "OK"
}

When I try to setup manually and select Gmail API I get a browser alert with the following content:

An unexpected error occurred {
    "readyState": 4,
    "responseText": "?{\"success\":true,\"data\":{\"dot_notation_url\":false,\"redirect_url\":\"http:\\/\\/*********.com\\/wp-admin\\/options-general.php?page=postman\",\"callback_domain\":\"http:\\/\\/*********.com\",\"help_text\":\"<b style=\\\"color:red\\\">Attention!<\\/b> Open the <a href=\\\"https:\\/\\/www.google.com\\/accounts\\/Logout?continue=https:\\/\\/console.developers.google.com\\/start\\/api?id=gmail\\\" target=\\\"_new\\\">Google Developers Console Gmail Wizard<\\/a>, create <b>a Client ID for web application<\\/b> with the values displayed below, and copy the generated Client ID and Client Secret here. See <a href=\\\"https:\\/\\/www.remarpro.com\\/plugins\\/postman-smtp\\/faq\\/\\\" target=\\\"_new\\\">How do I get a Google Client ID?<\\/a> in the F.A.Q. or <a href=\\\"https:\\/\\/vimeo.com\\/128589255\\\" target=\\\"_new\\\">watch our How-To video \\ud83d\\udcfa<\\/a>.\",\"client_id_label\":\"Client ID\",\"client_secret_label\":\"Client Secret\",\"redirect_url_label\":\"Authorized redirect URI\",\"callback_domain_label\":\"Authorized JavaScript origins\",\"referer\":\"manual_config\",\"display_auth\":\"oauth2\"}}",
    "status": 200,
    "statusText": "OK"
}

Redirect URl and Callback does not show up