You need to make a slight change to get this working.
1. Copy the shortcode given in the ‘Use this shortcode:’
2. Change the numeric code to match the number in the ‘Find your company ID:’ drop down.
This should worked for me.
I origianally couldn’t get the shortcodes to return, I discovered that not adding the ‘Company ID’ field caused the LinkedIn sync to fail silently. The company ID is part of the URL when you’re logged into LinkedIn.
I’m also having the same problem, Icannot generate an access token. Getting the ‘No companies retrieved! Make sure you’re the owner of the company via LinkedIn’ error