I am trying to create a new skill in the developer portal. My skill is to be hosted on a third-party server, but when I enter the URL in the Endpoint field and try to click through to the next page, I get an error saying "Invalid EndpointType
https://www.wolframcloud.com/objects/xxxxxx". I already have three skills I created a couple months ago that are hosted on that same site, and they are currently working fine. In fact, if I copy the URL from one of the working skills and try to use it for a new skill, I also immediately get the same Invalid EndpointType error. Has something changed in the time since I was last working on this project? Why is Amazon complaining about this endpoint?