I just tried to deploy ArcGIS 10.4.1 for Server using Cloud Builder 10.4.1 and I get the following error after filling in all the details.
'esri:arcgis-10-4-for-server:cloud:10.4.5686' is not available.

I can see the 10.4.1 under my account and I have deployed it once before.
Is anyone else experiencing this ?