Hello Alberto,

Thanks for reaching out to us.

Could you please check now, Due to some css missing, Off-canvas menu was hidden. I have fixed it by using this css:

@media (min-width: 991px){
a#offcanvas-toggler {
    display: none;
}
}
#offcanvas-toggler {
    width: 40px;
    height: 100%;
line-height: 60px;
}
#offcanvas-toggler .burger-icon span {
    width: 100%;
    height: 1px;
    background: white;
    display: block;
}
#offcanvas-toggler .burger-icon span:nth-child(2),
#offcanvas-toggler .burger-icon span:nth-child(3) {
    margin-top: 10px;
}

Thanks

Thank you.