carlucci
Hi
Please check the button code, its custom button in the article content and you have not added any Link on this.
See : http://prntscr.com/133hya9
You should add the link in the href tag to make it working.
Example code : <a href="https://www.salepepe.it/tecniche-base/carne-manzo/come-cucinare-la-tagliata" class="btn btn-primary"><strong>Ir a la página anterior</strong></a>
Regards