My username and password is correct and it only redirects to the login page after I login.
If you're using Chrome, you may need to remove all cookies related to your site and refresh the page.
To do this, open your admin area in tab, right click anywhere and select "inspect"
Go to the Applications tab in the Developer Tools window
In the left column, look for Storage. Inside of that is Cookies. Expand that view and select your website from the list.
Right click your website and select Clear
Refresh the admin page you are on and try logging in again.