Recently, my share feature stopped sharing to LinkedIn, saying I needed to refresh my connection. When I tried to, it said it could not do so. I deleted my existing LinkedIn account on my dashboard and attempted to make a new connection to my LinkedIn page. Still, no luck. My LI page is up, running fine, and I am not sure how to fix it so all my blog posts are automatically shared again to that page.
Log in to your LinkedIn account and go to the Privacy & Settings page.
In the bottom left, click the "Groups, Companies & Applications" tab.
Look for the Applications section and click on "View your applications."
This should take you to a page called "Authorized External Applications." Look for WordPress.com in the list on that page, check the box next to it, and then click the Remove button.
Now, go back to Settings > Sharing on your WordPress.com blog and try setting up the LinkedIn connection again.
WORD PRESS ERROR: There was a problem creating your connection. Please go back and try again.
I have also followed the instructions (to a T) found here: http://en.support.wordpress.com/publicize/#reconnecting-linkedin
WP gets added back in to the Authorized External Apps on LinkedIn but still fails to connect w/ WP (or vice-versa - depending on who you want to blame for the failure).