I am having the same problem, specifically when it comes to clipping from The Economist.
When I try to save an article to Evernote from the Economist Android app, I get the attached "Clipping..." screen in Evernote, but the article never comes through.
The iOS app is slightly better, in that it clips the title and subtitle, but no actual content (see attached). I am a subscriber so that should not be an issue.
Clipping from the Economist website using Evernote web clipper works just fine, it is the mobile versions that appear to be blocked/failing!