The LinkedIn share box relies on websites to use Open Graph Protocol (OGP) to display the most accurate title, description, and image when sharing a URL. If the website you're sharing doesn't use OGP, the link may not work or other site content may be displayed.
You'll want to notify the owner of the site that you’re not able to share their links.
If you’re a website developer, learn how to ensure links from your site can be shared.
Learn more if you need to edit the image for a Company Page update.