Coda PHP & Web Toolkit freezes on "Tidy HTML" with this code

<!DOCTYPE html>
<html >
  <head>
    <meta charset="UTF-8">
    <title>Client Access</title>
    <link href='http://fonts.googleapis.com/css?family=Titillium+Web:400,300,600' rel='stylesheet' type='text/css'>

    <link rel="stylesheet" href="css/normalize.css">
    <link rel="stylesheet" href="css/style.css">
  </head>

  <body>

    <div class="form">

      <ul class="tab-group">
        <li class="tab active"><a href="#signup">Sign Up</a></li>
        <li class="tab"><a href="#login">Log In</a></li>
      </ul>

      <div class="tab-content">
        <div id="signup">
          <h1>Sign Up</h1>

          <form action="/clients/register/" method="post">

          <div class="top-row">
            <div class="field-wrap">
              <label>
                Name<span class="req">*</span>
              </label>
              <input name="name" type="text" required autocomplete="off" />
            </div>

            <div class="field-wrap">
              <label>
                Company<span class="req">*</span>
              </label>
              <input name="co" type="text"required autocomplete="off"/>
            </div>
          </div>

          <div class="field-wrap">
            <label>
              Email Address<span class="req">*</span>
            </label>
            <input name="email" type="email" required autocomplete="off"/>
          </div>

          <div class="field-wrap">
            <label>
              Set A Password<span class="req">*</span>
            </label>
            <input name="pwd" type="password"required autocomplete="off"/>
          </div>

          <input type="hidden" name="action" value="register" />
          <button type="submit" class="button button-block"/>Get Started</button>

          </form>

        </div>

        <div id="login">
          <h1>Welcome Back!</h1>

          <form action="/clients/" method="post">

            <div class="field-wrap">
            <label>
              Email Address<span class="req">*</span>
            </label>
            <input name="email" type="email" required autocomplete="off"/>
          </div>

          <div class="field-wrap">
            <label>
              Password<span class="req">*</span>
            </label>
            <input name="pwd" type="password"required autocomplete="off"/>
          </div>

          <p class="forgot"><a href="#">Forgot Password?</a></p>


          <input type="hidden" name="action" value="login" />
          <button class="button button-block"/>Log In</button>

          </form>

        </div>

      </div><!-- tab-content -->

</div> <!-- /form -->
    <script src='http://cdnjs.cloudflare.com/ajax/libs/jquery/2.1.3/jquery.min.js'></script>
    <script src="js/index.js"></script>
  </body>
</html>