navigator

Well, I don't know if that is a bug, or just my issue. After 2 clean installations version 9.11.14 (weekly) on my Mi9T Pro, when I try to open the browser or the file manager, they open but not to the screen. Then, if I go to the recent apps and I click on them, I get an error message: "Security...

From some weeks on, each time I unlock the screen to run my Redmi 3 Pro, appears first a blank wep page, and then another with some spam. I got to close both quickly (if not they appear again) in order to start working with my mobile. I have checked for info but I can not find how to solve...