Skype seems to be not available on the 20th June 2017 as many users claim there are connection issues with Skype. It basically won’t connect to Skype or whats even worse, you will receive multiple message from Skype.
According to the web, Skype is offline and it doesn’t matter you use the Desktop version or the Web Client. In both cases, it is not possible to connect to the Skype servers from Microsoft.
We will keep you updated on when Skype goes online again.