I am having the same problem here. The plugin worked just fine with no problems when I installed it on our test server, but when I moved the site to the client’s server, the plugin stopped working. I get the email, but the inline link does not appear.
So far this has been the only issue with moving the site to the new server, and the plugin still works on the test server. wp_footer() is in place, so it’s not that.
https://brandjuice.com/index.php/things-2-know/white-papers/
Is there any reason why a server move would break the plugin?