Found this on the official project spark forums
If your tying to activate your beta key through the project spark beta application you may receive an error message that says
"cannot connect to servers, try connecting to xbox.com . A connection is required at this time.
To solve this exit project spark app completly (ALT+F4) and right click your date located at the bottom right of your screen and select adjust time
in the pop up box select the tab " Internet time" then "Change settings" then "update now" hit ok and click on the date and time tab and click change time zone select your time zone then click ok and apply.. restart your computer and open project spark. All xbox connectivity problems should be fixed!! Please comment below if this was helpful or not!