I have logged out and logged on my NAS and this is all I get trying to Install the Updated Emby Server.
I got it to work. Synology gave me some steps that did not work. But after Trying all browser, I thought of one I did not try. Internet Explorer. Synology will be working on a fix for why the other browsers will not work. I'm thinking its something to do with the latest DSM update. So the step is 1. Shutdown Emby 2. Manual Install with Internet Explorer