@David_Hartness, when I follow the link you provide it gives a message that it no longer exists (this is a message issued by the salesforce server). See image. If this were a valid link for pushing information then the least we would expect to see is a not authorized message.
EDIT: the URI encoding is messing the link up. The part at the end that says encoding=UTF-8 isn’t being picked up right because it’s getting encoded as encoding=UTF%E2%80%908
When I manually correct this in the url field of my browser, I at least see a blank (non response) page