Menu icon

I have used your “spring” template to create our new website. Is mostly great but the menu icon is missing. If I open a page from my hard drive, the icon shows. But the live website only shows a placeholder for the missing icon.
I know I missed uploading a file but I cannot seem to be able to find it. Can you please tell me which file points to the menu icon? I’m sorry if this seems ignorant. I’ve verified file by file and can’t seem to find what I’m missing.

Here’s that part of the code I have along with pics of working and not working menu icon.

<div class=“col-9 d-flex align-items-center text-right”>
<ul class=“ftco-social mt-2 mr-3”>
<li class=“ftco-animate”><span class=“icon-youtube”></span>
<li class=“ftco-animate”><span class=“icon-facebook”></span>

<button class=“navbar-toggler d-flex align-items-center” type=“button” data-toggle=“collapse” data-target="#ftco-nav" aria-controls=“ftco-nav” aria-expanded=“false” aria-label=“Toggle navigation”>
<span class=“pt-1 mr-1”>Menu</span> <span class=“oi oi-menu”></span>
<div class=“collapse navbar-collapse” id=“ftco-nav”>
<ul class=“navbar-nav ml-auto”>
<li class=“nav-item active”>Home
<li class=“nav-item”>About
<li class=“nav-item”>Ministries
<li class=“nav-item”>Sermons
<li class=“nav-item”>Upcoming Events
<li class=“nav-item”>Blog
<li class=“nav-item”>Contact