[AC Question]

Hello, I have a brand new redmi 3 pro running android 5.1 and miui 7.3 and after some weeks of use this started happening.
When I open the google play app it shows: "authentication is required you need to sign in to your google account". When I open the youtube app it tels me: "conection error: RETRY". If I try to search something on google maps, a notification appears telling me that maps won't run unless I update the google play services. Google doc doesen't let me open the documents and so on... And also I can't play Pokemon go, I thing it has to do with my google account.

But the curious thing is that if I click one of the youtube notifications that shows that a subscriber has uploaded a video I can see it with no problems.
Sometimes when I change of wifi all the apps work, but most of the time don't do.
Please help me!