Login Error on Huawei P8 Lite. How can I get the way?

I have had the problem for about a year that every time after I unlock my Huawei the following screen appears (see below). If I go to the square (at the bottom right of the screen, do not know what that means) then it does not come because there's a new app is open. Can someone help me or does anyone know what's coming from and / or how to get it off?

Kind regards

battlestar

P.S.: The "day" in the picture is not a day from a calendar, but a "day" (English) to assign things.

Image description: White screen, caption: "New tag captured", text: "This tag is empty or the phone is not properly aligned."

Turn off your NFC.

Do you have a phone case with NFC tag or the like? Because that's a message from the NFC.

The question has been resolved. The solution was that I had to turn off NFC. I've probably turned on sometime and then completely forgotten and overlooked.