I apologize if you're unable to add your contact as easily as you should. We would however like to clarify exactly what you are experiencing. For instance, what browser are you working in? Are you receiving any error messages? Does it happen with more than one contact? Even in a different browser or a private/incognito window? Testing your browser like this allows us to see if there are any 3rd party add-ons that could affect how Constant Contact works in a browser. In the meantime, as a workaround are you able to upload this contact through an excel file?