Sometimes Chrome will interfere with administering a WordPress blog. As an extra level of protection, WordPress sometimes adds a login that prevents machines from logging in. Before it lets you enter your real user ID and password, it will present a login screen and text that tells you what to fill in. Usually the login is just random letters and numbers, and the password is often expressed as the total of a sum of two numbers, so that the actual password number does not appear in the text.
Chrome does not display the page with the text and login screen. It simply displays a message saying that your login is not private. One solution to this is to login with another browser, like Firefox, with displays the page of additional security. Write down the ID and password, and you may be able to use it to log in via Chrome, although that pages does not appear. You enter the WordPress generated info on the first screen, and if you are lucky Chrome will then take you to real login screen.