Help with canonical links

Hello, I'm having difficulty with canonical links. Before downloading the zip, I put this link:
http://stories.oglobo.globo.com/guia-mente-sa/

But when I click on the share link, the link that appears there is:
http://stories.oglobo.globo.com/guia-mente-sa//-M4EbBB4k8K_x7MbXPYG

Thanks for listening