nicegui: on air not working with ui.charts

Description

Hello,

When trying to launch an application on air (nicegui version 1.3.6, Python 3.10.1) which contains a ui.chart object, the page does not load because the Highcharts javascript files are not available. The expectation is that on-air instances work with Highchart plots as they do with local instances.

Below is a minimal example which fails:

from nicegui import ui

chart = ui.chart({
    'title': False,
    'chart': {'type': 'bar'},
    'xAxis': {'categories': ['A', 'B']},
    'series': [
        {'name': 'Alpha', 'data': [0.1, 0.2]},
        {'name': 'Beta', 'data': [0.3, 0.4]},
    ],
}).classes('w-full h-64')

def update():
    chart.options['series'][0]['data'] = chart.options['series'][0]['data'][::-1]
    chart.update()

ui.button('Update', on_click=update)

ui.run(on_air=True)

The error message of the on-air website in the browser are as follows:

Failed to load resource: the server responded with a status of 500 (Internal Server Error)
/devices/kz51SNxZ/_nicegui/1.3.6/libraries/6fa6d5d3f0b83e88a6a399dccc25b337/highcharts-3d.js:1

Failed to load resource: the server responded with a status of 500 (Internal Server Error)
/devices/kz51SNxZ/_nicegui/1.3.6/libraries/6fa6d5d3f0b83e88a6a399dccc25b337/highcharts.js:1 

Failed to load resource: the server responded with a status of 500 (Internal Server Error)
/devices/kz51SNxZ/_nicegui/1.3.6/libraries/6fa6d5d3f0b83e88a6a399dccc25b337/highcharts-more.js:1

When trying to add additional resources like extras=['exporting'], these files will also not be available.

It seems like the CDN of the on-air instance does not publish the Highcharts javascript files. Somewhat related (but possibly a separate issue) is that files published with app.add_static_file(s) are also not available with on-air instances.

Thank you