Observed behavior: when the dashboard is provisioned, authentication might have been enabled (username+password authentication). If this is enabled, one is unable to add a Google Maps API key without first disabling authentication (which also completely removes the username+password). This is rather unfortunate in use cases where the username+password are being provisioned as part of the deployment of the dashboard itself.

Expected behavior: if no Google Maps API key has been entered, it should always be possible to add that. It should not matter if authentication is enabled or not.