A strange link issue, where it does not work

Hello, my client has a strange issue with an <`a> link not going to the site when clicked, it is still persived as a link in all known brosers just when clicked it does not go to that page.

The site is http://daniel-chaplin.co.uk/.

The link in question is the top left header text where under it, it says "Visit my linked in profile", when click it should open a new tab and go to my clients linked in profile, instead it does nothing, when right clicking it says "open link" and that works it is strange.

Thank you for your help