I am also having the same issue with this plug-in. I have disabled and removed all other plug-ins, but still receive the same error message when I try to “manage ads.” I get this: “Oops. Something went wrong. Please try again.”
I’ve uninstalled and reinstalled the Google Plug-in. I am currently using Coraline theme, and I recently updated my site (www.raisingkidswithoutreligion.net)