HI, we set up the password protect on a test page but its just simply not working. You can see the test page here:
The password is 123456 and I can confirm by:
When you enter the password simply nothing happens.
Wordpress = 4.1
WPMU Dashboard = 3.4.9
Password Protect = 1.1
Host = WP Engine
Ive also included a screenshot of our plugins.
If you need any additional info, please do not hesitate to ask.