Q: why is not working the app store properly today?

Howdy mhemho,

I understand that you're having trouble getting the Mac App Store to work correctly on your Mac. Fortunately the two articles linked below detail a number of steps that can help restore the Mac App Store to a functional state on your Mac.

Troubleshooting the Mac App Store
https://support.apple.com/en-us/HT203421

OS X: "Cannot connect" or "Cannot connect to the App Store. An internet connection is required"
https://support.apple.com/en-us/HT203811

Regards!