Can't change user settings

I’m trying to look at my User info to check that I have the right blog address in the Blog Feeder. When I click on the User icon in the site menu and then click on the link to change my password or name (which I guess is where I need to go to check the blog address too), I get a blank page if I do it on my laptop. This happens for example from I am logged in.
It did work about a week ago.
On my iPad, nothing at all happens when I click on the user icon.