Sorry for double post, but I have already solved the problem 😀 !!
It was a z-index problem not recognized by all browsers. I had a background-cover class in the code which covered all the page, and that caused the link to be covered by a transparent panel.
Thank you for your help!
I removed that tag totally but the problem persists. I didn’t remove </div> though.. It seems as if it was a problem related to z-index, but I haven’t found it yet.