I reviewed your account and I believe I may have found the issue. On your email campaign you have a link to your company LinkedIn page. The social share does not work for company LinkedIn pages. It will only connect to your personal LinkedIn Page. I am showing that social share is connected to your personal LinkedIn page. Because I am not following you I cannot see your post. When you log in click on the Profile Tab, click on the arrow next to “View profile as” and select Recent Activity. That will show your posts.
If you would like your campaign to be posted to your company LinkedIn page you can get the Short URL to the campaign and post it manually to your company LinkedIn page.