Navbar toggle collapse doesn't appear

Question

I have a problem with the header on my website. When I click the button to toggle the mobile menu on the navbar it "works" but the content doesn't appear.

I tried it on Bootply and it worked:

Answer 1

remove overflow: hidden from .headerp or change to overflow: visible

collapsed menu is inside .headerp that have fixed height and overflow: hidden .

@media (max-width: 768px)
.headerp {
    height: 80px;
    overflow: visible;
}