I'm on iOS 10.1.1 on an iPhone 7+. I'm not sure where to find which version of Evernote I'm using, but when it stopped working, I updated to the latest version and it still didn't work. What happens is I select Share to Evernote, I select the notebook and tags, then when I click the send button, it just spins forever. It never adds it. I have to just cancel and try again from my desktop if I remember.