External link at menu home page not working

The external links at menu home page stopped working, except “Catálogo”. When on other pages such as “Catálogo” the external links such as “Contato” and “Peças fabricadas” work just fine. Neither child or parent WPLab Recover theme menus are working, but when I change to other theme the external links responde normally. The website is www.incomplast.com.br

Any suggestions?