Was this ever resolved? I came across the same issue, and ended up
modifying all the endpoints via crxde for the cloud configuration. For
example, https://api.na1.echosign.com/ -> https://api.na2.echosign.com/
Although the cloud service connects, I still see the following
error:EchoSignServiceImpl Unable to create
AEM-AS-100: Error reported by Adobe Sign: Request must be made to
correct API access point (e.g. use GET /base_uris)...
I was reminded today it is not possible to get to page references
without classic UI. Now that we are on 6.3, this seems impossible
without investing development hours. It would be very handy, dare I say
'enterprise,' if page references were available in touch UI.