Tumblr Redirects to 404 Page - redirect

Question

We have had a Tumblr page set up for a year with no issues until this past month.
We have a page redirect in our navigation bar. The redirect goes to our main website, WordBrewery.com. The link listed in the redirect is the main URL - http://www.wordbrewery.com.
Now it is redirecting to our site's 404 page and this is added to the end of the URL:
#_=_
I have tried using this script, but it has done nothing:
<script>
if (window.location.hash == "#_=_")
{
window.location.hash = "";
}
</script>
I have also tried replacing the main URL with a shortened Google version but this has not worked either.
Any help would be greatly appreciated.
EDIT:
The hard code that I am able to edit appears like this:
<nav class="navbar navbar-inverse navbar-fixed-top">
<div class="container">
<div class="navbar-header">
{block:IfShowAvatar}
<img src="{PortraitURL-128}" class="{AvatarShape}" alt="{Title}" />
{/block:IfShowAvatar}
<button type="button" class="navbar-toggle collapsed" data-toggle="collapse" data-target="#navbar" aria-expanded="false" aria-controls="navbar">
<span class="sr-only">Toggle navigation</span>
<span class="icon-bar"></span>
<span class="icon-bar"></span>
<span class="icon-bar"></span>
</button>
</div>
<div id="navbar" class="collapse navbar-collapse">
<ul class="nav navbar-nav">
{block:IfShowTitle}<li class="active">{Title}</li>{/block:IfShowTitle}
{block:IfShowArchiveLink}
<li>{lang:Archive}</li>
{/block:IfShowArchiveLink}
{block:IfShowRandomLink}
<li>{lang:Random}</li>
{/block:IfShowRandomLink}
{block:HasPages}
{block:Pages}<li>{Label}</li>{/block:Pages}
{/block:HasPages}
{block:AskEnabled}
<li>{AskLabel}</li>
{/block:AskEnabled}
{block:SubmissionsEnabled}
<li>{SubmitLabel}</li>
{/block:SubmissionsEnabled}
{block:IfTagMenuList}
<li class="dropdown">
<a href="#" id="tag-menu" data-toggle="dropdown" aria-expanded="true">
{text:Tag Menu Title} <span class="caret"></span>
</a>
<script>
var list = '{text:Tag Menu List}';
list = list.split(',');
var html = '<ul class="dropdown-menu" role="menu" aria-labelledby="tag-menu">';
for(var i=0; i<list.length; i++) {
html += '<li role="presentation"><a role="menuitem" tabindex="-1" href="/tagged/' + list[i] + '">#' + list[i] + '</a></li>';
}
html += '</ul>';
document.write(html);
</script>
</li>
{/block:IfTagMenuList}
{block:IfShowSearch}
<li><a class="icon-search search-overlay-show"></a></li>
{/block:IfShowSearch}
</ul>
</div><!--/.nav-collapse -->
</div>
</nav>

Answer 1

I am unsure of how to get rid of the string Tumblr adds to redirected URLs but alternatively you can hard code the link to avoid utilising Tumblr's redirect.
Beneath {block:HasPages} add <li>WordBrewery.com</li>