I am having the same problem. In Safari, when I click on the Evernote Clipper icon on the top toolbar it asks me to sign in. I do using my Evernote user name and password as I have in the past. I dod not use the Google sign on despite having a gmail account. After clicking sign on the box disappears.
When I go to clip an article the colored process bar light up under the web address bar and disappears mid way. No pop up box appears as in the past. I tried to see if the clipped article might be showing up in either the Evernote app or in the online web version but nothing shows up.
This has been occurring for the past week. I figures it might just be a quirk that has occurred sine your migration to Google.