I enter the time machine. I select a folder in finder. I see red bars on the right. If I try to click a red bar, scroll or click up/down arrows, nothing happens. It looks like I can't go back in time. I tried to leave the TM open for a while. Nothing.
I tried other folders, same result.
I'm on Yosemite. Never had problem before, but now of course, I need really the data