According to the documentation, I followed everything correctly, but I keep getting the following error:

<!doctype html> <html> <head> <title>My Skype Web SDK app</title> <script src="https://swx.cdn.skype.com/shared/v/1.2.15/SkypeBootstrap.min.js"></script> </head> <body> <script> Skype.initialize({ apiKey: 'a42fcebd-5b43-4b89-a065-74450fb91255' }, api => { var app = new api.application; app.signInManager.signIn ({ username: 'sdfsfsfdsfsdf', </script> </body> </html>
source share