As part of setting up access to the vSphere+ / vSAN+ Cloud Service, a vCenter Cloud Gateway (VCGW) is deployed into your on-premises infrastructure and serves as a gateway between your vCenter Server(s) and the VMware Cloud Console.
If the VCGW has connectivity issues to the VMware Cloud Console for whatever reason, your infrastructure and workloads continue to run but you will not be able to perform any operations through the VMware Cloud Console until connectivity is restored.
However, if you attempt to login into your on-premises vCenter Server(s) using the vSphere UI, you may be surprised to find the following error message.
The message may looking alarming at first about not being able to login, but can still login even if connectivity between the VCGW and VMware Cloud Console has been lost.
While I will agree the user experience may not very intuitive, the hint is in the URL link below where it says "Still having connection problems?"