I'm having this issue is well, all of a sudden. Typically I use Chrome, but I'm currently having issues with Chrome, so that is not an alternative for me. I started using Safari Evernote extension yesterday or the day before and it worked fine up until about a half hour ago (12:30am Central US Wednesday 10/12). Then it just started giving the error "cannot save clip". That is all. No uninstalling/reinstalling, no signing out/signing in, no restarting the computer does any good.
I am running El Capitan 10.11.6, Evernote 6.9.2 and Safari 10.0