Through experimentation and investigation, I have determined what the issue is. The issue with StumbleUpon sharing lies with URL shorteners. If you enable the built-in wp.me short links or set up bit.ly short links, you’ll get the Add Page Error when you try to share to StumbleUpon. If you disable short links, then the StumbleUpon button/badge will share pages just fine. Unfortunately, this means you cannot use short links for any social sharing. I don’t know if there is a way to allow users to choose which social media sharing options they want short links used with.
It’s been over a week now. No reply from support. Visitors still cannot share pages via StumbleUpon. When the StumbleUpon button in super socializer is clicked, users still receive the error message that StumbleUpon is having an outage.
How do we resolve this issue?
