Bootstrap tab content won't open after clicking tab link - twitter-bootstrap-3

Question

Code looks fine in my opinion, I basically used the example code from the docs. jQuery is also referenced before bootstrap.js as well. What could be the issue here? When I click on any other tab that's not active, it still only displays the first tabs content.
<section id="how-it-works">
<div class="container">
<div class="wizard">
<div class="wizard-inner">
<div class="connecting-line"></div>
<ul class="nav nav-tabs">
<li class="active">
<a href="#tab1" data-toggle="tab" aria-controls="tab1" role="tab" title="Step 1">
<span class="round-tab">
<i class="glyphicon glyphicon-folder-open"></i>
</span>
</a>
</li>
<li>
<a href="#tab2" data-toggle="tab" aria-controls="tab2" role="tab" title="Step 2">
<span class="round-tab">
<i class="glyphicon glyphicon-pencil"></i>
</span>
</a>
</li>
<li>
<a href="#tab3" data-toggle="tab" aria-controls="tab3" role="tab" title="Step 3">
<span class="round-tab">
<i class="glyphicon glyphicon-picture"></i>
</span>
</a>
</li>
<li>
<a href="#tab4" data-toggle="tab" aria-controls="tab4" role="tab" title="That's It!">
<span class="round-tab">
<i class="glyphicon glyphicon-ok"></i>
</span>
</a>
</li>
</ul>
</div>
<div class="tab-content">
<div class="tab-pane active" id="#tab1" role="tabpanel">
<h3>Step 1</h3>
<p>This is step 1</p>
</div>
<div class="tab-pane" id="#tab2" role="tabpanel">
<h3>Step 2</h3>
<p>This is step 2</p>
</div>
<div class="tab-pane" id="#tab3" role="tabpanel">
<h3>Step 3</h3>
<p>This is step 3</p>
</div>
<div class="tab-pane" id="#tab4" role="tabpanel">
<h3>Step 4</h3>
<p>That's It!</p>
</div>
</div>
</div>
</div>
</section>

Answer 1

Try removing the # in the ID of each tab under tab content.
id="#tab4" to id="tab4"
Also, you tagged bootstrap 3 but the code you are using looks like it is from bootstrap 4.
https://v4-alpha.getbootstrap.com/components/navs/