hey, i think at this point most of the default widgets work, with the exception of flight tracker, ski report, and movies.
flight tracker looks like it doesn't use apple's widget server (wu.apple.com, the one that shut down 5 years ago), it uses flytecomm's own server. however, that server is no longer up either and after some research i think flytecomm might have gone bankrupt, and had to cease their services as a result. it seems like a complicated widget to fix.
movies, i don't see it contact any server through the proxy, but according to the parser.js, it uses wu.apple.com to get the ticket purchase page url, but other than that its trailers.apple.com and apple.com/trailers to get movie/theater data. both of which now redirect to tv.apple.com, which is probably why the widget is failing. also seems difficult to fix.
i think ski report may be an easier one, but i just can't find a reliable api for it. i didn't want to use a json one, since the widget expects xml. there were few xml ones i found, and they all had low quotas or just had terrible documentation. i am still trying to find a way to get this widget working, but if someone could suggest a stable ski resort api (preferrably in xml), please let me know! thank you.