Identified - Google have responded and our G Suite application is now showing in the G Suite Marketplace: https://gsuite.google.com/marketplace/app/cronofy/902414518019

It is currently offering "domain install" and "individual install". "Domain install" is the option you need to select to use Enterprise Connect.

We're continuing to correspond with Google to get our G Suite application listing accurate. It appears that they are making changes on their side at the moment.

The published link of https://chrome.google.com/webstore/detail/cronofy/addpjfjiamildabdcppfadfmiloppkhl redirects to the G Suite Marketplace listing and so should still work. We will be updating our site and documentation to link directly to the G Suite Marketplace once we have confirmation from Google that all issues are resolved.
Nov 13, 02:14 GMT

Update - We have raised an issue with Google support and are awaiting their response.
Nov 12, 16:42 GMT

Investigating - We've had reports that the Google service account app page is displaying errors (https://chrome.google.com/webstore/detail/cronofy/addpjfjiamildabdcppfadfmiloppkhl) we are investigating the root cause.

Existing Service Account users are unaffected by this.
Nov 12, 13:33 GMT