Dropdown Menu Issue

Site URL: https://www.ucan.today

I'm having issues with the code pasted below. I currently have it on my website (www.ucan.today), and when I try to use the dropdown menu, the menu always goes away when I try to click one of the menu options. Squarespace support says there is any error with the code, but I have no idea what the issue might be.

a.header-nav-folder-title:after {

    content: "\e009";

    font-family: 'squarespace-ui-font';

  position: relative;

    top: 2px;

}
div.header-nav-folder-content {
    background-color: #b0bb8d !important;
}

div.header-nav-folder-content * {
    text-align: left !important;
}
.header-nav-folder-item {
    margin-bottom: 8px;
}

.header-nav-folder-content {
    margin-top: 4px;
}

Thank you so much! That worked!! 😄