Error says "You must enter your user name." but the label above says "Please enter your email address"
The error text should depend on the "Use Email for Login?" site setting, if this setting is true then the error should be "You must enter your email address", otherwise it should be what it is now.
The error text should depend on the "Use Email for Login?" site setting, if this setting is true then the error should be "You must enter your email address", otherwise it should be what it is now.