Failed to retrieve repositories from google cloud platform



I’ve connected my C9 account to GCP, but it seems that c9 is not able to retrieve the list of my GCP projects.
I’m getting ‘Failed to retrieve repositories from google. Please contact support if the problem persists.’ under the Google Cloud Platform repository.

The networks console shows that the service is not available (503) when calling the following url:

It persists.

Thank you for your help.