Cannot create or redefine character styles in Pages 5.6
I'm trying to create a new character style in Pages 5.6. The text currently has Character Style "None" applied to it. I format the text, select it, go to the Character Styles menu, and when I open it, the "+" is there but is not highlighted blue. When I click it, nothing happens. I was able to do it once, but it stopped working after that. I quit and restarted Pages with no luck. And I'm running Yosemite, Pages 5.6.1. My profile says El Capitan, but I upgraded/reverted to Yosemite.
So, I thought I'd just redefine an existing style as a workaround, but when I try to do that, Redefine Style is greyed out.
I've tried selecting just a word, a whole paragraph, and everything in between, and no luck. Any suggestions?
Thanks!
MacBook Air 13", 10.11