From Wikipedia:

"Skype originally featured a hybrid peer-to-peer and client–server system; however, since May 2012, Skype is entirely powered by Microsoft-operated supernodes. The 2013 mass surveillance disclosures revealed that Microsoft has granted intelligence agencies unfettered access to supernodes and Skype communication content."

Can anyone spot where they went wrong?

It's working for me on desktop.

I used https://web.skype.com when desktop skype was down :)

Down for me for at least last 6 hours. Text chat is going through but calls are not.