OpenLayers 3.15.1 - Unable to get value of the property 'add'
<p>New error introduced on load of map:</p>

<p>OpenLayers 3.15.1 - Unable to get value of the property 'add'.</p>

<p>Error is in the following line of ol-debug.js:</p>

<p><strong>this.element.classList.add(ol.css.CLASS_HIDDEN);</strong></p>

<pre><code>/**
   * @private
   * @type {number|undefined}
   */
  this.rotation_ = undefined;

  if (this.autoHide_) {
    this.element.classList.add(ol.css.CLASS_HIDDEN);
  }

};
goog.inherits(ol.control.Rotate, ol.control.Control);
</code></pre>

<p>Error does not happen in OpenLayers 3.13.0</p>

<p>I am using jquery-1.11.2.min.js</p>

<p><strong>Update #1</strong>
Issue is only happening on IE9</p>

<p><strong>Answer:</strong></p>

<p>OpenLayers 3.14.0 and newer no longer support IE9 out of the box. The last version of out-of-the-box OpenLayers that supports IE9 is v3.13.1. I will be using v3.13.1 for now until all my users are at IE10+</p>