I have the panel closing on a button click but when I click the button again, the panel won't open. 

I have checked to make sure that I wasn't missing any closing tags and found that everything was fine.

Not sure what I missed.

```html
<script src="https://cdnjs.cloudflare.com/ajax/libs/jquery/3.3.1/jquery.min.js"></script>
<link rel="stylesheet" href="https://maxcdn.bootstrapcdn.com/bootstrap/3.3.7/css/bootstrap.min.css" integrity="sha384-BVYiiSIFeK1dGmJRAkycuHAHRg32OmUcww7on3RYdg4Va+PmSTsz/K68vbdEjh4u" crossorigin="anonymous">

<script src="https://maxcdn.bootstrapcdn.com/bootstrap/3.3.7/js/bootstrap.min.js" integrity="sha384-Tc5IQib027qvyjSMfHjOMaLkfuWVxZxUPnCJA7l2mCWNIpG9mGCD8wGNIcPD7Txa" crossorigin="anonymous"></script>

<button class="btn btn-primary" type="button" data-toggle="collapse" data-target="#myPanel" aria-expanded="false" aria-controls="myPanel">
    Collapse
  </button>

<div id="VIDContactInfoWrapper" style="border:1px solid black;">
  <div class="panel panel-default" style="height:inherit;">
    <div class="panel-heading" style="padding: 5px 5px !important">Information</div>
    <div class="panel-body" id="myPanel" style="padding-top:0;padding-bottom:0;height:300px; background-color:hotpink;">
      <div class="row">
        <div class="col-md-12">
          <div class="row">
            <div id="VIContactInfo" class="col-md-6" style="background: white;"></div>
            <div id="VIAddressInfo" class="col-md-6" style="background: white;"></div>
          </div>
        </div>
      </div>
    </div>
  </div>
</div>
```