script error: Lona is not defined

[pfpulux]

if I run template_test_script.py get this error via the browser console:

(index):139 Uncaught ReferenceError: Lona is not defined
    at (index):139:20

137    <script>
138      // setup lona context ---------------------------------------------------------
139    var lona_context = new Lona.LonaContext({
140    target: '#lona',
141    title: 'My Fancy Script',
142    update_address_bar: true,