Edit: After half day, my wife’s Mac started having the same problem. I have then applied the solution that I found in the Apple
iTunes Connect Will Close For Holidays From December 22 to 29 –
Apple has just started emailing developers informing them about iTunes connect temp close down over the winter holidays. The shut down will take place from December 22nd to 29th and will not allow developers to change the price and also you can expect no updates with in this time zone. For developers thinking ahead and planning updates for in this time zone there app maybe made unavailable to purchase.
Tunes Connect will be temporarily shut down from Thursday, December 22 to Thursday, December 29 for the winter holidays.
During this shutdown, the following functionality will be unavailable:
Access to iTunes Connect
The delivery of any apps or updates
Additionally, the following will be delayed:
Releases scheduled to appear on the App Store for the first time
Pricing changes scheduled through the interval pricing system in iTunes Connect
We strongly recommend that you do not schedule pricing changes through the interval pricing system in iTunes Connect that would take effect from December 22 through December 29. Pricing changes scheduled to take effect during this date range will not be reflected in the App Store and the app will become unavailable for purchase.
We also recommend that you do not schedule any apps to go live during the shutdown. Releases scheduled with a sales start date between these dates will not go live until after the shutdown.
The App Store team