# Error loading dependencies - Security settings problem?

**URL:** <https://community.plotly.com/t/error-loading-dependencies-security-settings-problem/9867>\
**Category:** Dash Python\
**Created:** [April 24, 2018, 9:15am UTC](https://community.plotly.com/t/error-loading-dependencies-security-settings-problem/9867 "2018-04-24T09:15:27Z")\
**Posts on this page:** 3\
**Page:** 1

<div class="post-metadata">

**Author:** ![Inkidu](https://avatars.discourse-cdn.com/v4/letter/i/f08c70/32.png) [@Inkidu](https://community.plotly.com/u/Inkidu)\
**Post date:** [April 24, 2018, 9:15am UTC](https://community.plotly.com/t/error-loading-dependencies-security-settings-problem/9867/1 "2018-04-24T09:15:27Z")

</div>

Hi everyone,

Embarrassing, but I can’t seem to get the most basic app to work. I got it from the Getting Started page.

```
# -*- coding: utf-8 -*-

import dash
import dash_core_components as dcc
import dash_html_components as html

app = dash.Dash()

app.layout = html.Div(children=[
    html.H1(children='Hello Dash'),

    html.Div(children='''
        Dash: A web application framework for Python.
    '''),

    dcc.Graph(
        id='example-graph',
        figure={
            'data': [
                {'x': [1, 2, 3], 'y': [4, 1, 2], 'type': 'bar', 'name': 'SF'},
                {'x': [1, 2, 3], 'y': [2, 4, 5], 'type': 'bar', 'name': u'Montréal'},
            ],
            'layout': {
                'title': 'Dash Data Visualization'
            }
        }
    )
])

if __name__ == ' __main__':
    app.run_server(debug=True)

```

I’m getting the ‘Error loading dependencies’ message. I think all my packages should be up-to-date:

```
dash==0.22.0rc2
dash-core-components==1.0.0rc1
dash-html-components==0.11.0rc1
dash-renderer==0.12.1
dash.ly==0.17.3

```

I’m on a macbook pro. I tried running the app in Opera, Safari and Chrome.

Opened the js console in Chrome, and it says:

```
Failed to load resource: the server responded with a status of 404 ()
Refused to execute script from 'https://unpkg.com/dash-html-components@0.11.0rc1/dash_html_components/bundle.js' because its MIME type ('text/plain') is not executable, and strict MIME type checking is enabled.
Error: dash_html_components was not found.
    at Object.resolve (bundle.js:14)
    at s (bundle.js:14)
    at Array.map (<anonymous>)
    at s (bundle.js:14)
    at e.value (bundle.js:14)
    at p._renderValidatedComponentWithoutOwnerOrContext (react-dom.min.js:13)
    at p._renderValidatedComponent (react-dom.min.js:13)
    at performInitialMount (react-dom.min.js:13)
    at p.mountComponent (react-dom.min.js:13)
    at Object.mountComponent (react-dom.min.js:14)

```

The second line makes me think I should change something in security settings, but I cannot figure out if that’s the problem, and if so, what to change.

Apologies if this is trivial.

Thanks for any help you can give!

---

<div class="post-metadata">

**Author:** ![chriddyp](https://sea2.discourse-cdn.com/flex024/user_avatar/community.plotly.com/chriddyp/32/16855_2.png) [@chriddyp](https://community.plotly.com/u/chriddyp)\
**Post date:** [April 24, 2018, 1:41pm UTC](https://community.plotly.com/t/error-loading-dependencies-security-settings-problem/9867/2 "2018-04-24T13:41:07Z")

</div>

> [@Inkidu](#):
>
> dash==0.22.0rc2  
> dash-core-components==1.0.0rc1  
> dash-html-components==0.11.0rc1

You’re using a set of unstable pre-release components. Please see [Installation | Dash for Python Documentation | Plotly](https://dash.plot.ly/installation) for the latest set of packages.

---

<div class="post-metadata">

**Author:** ![Inkidu](https://avatars.discourse-cdn.com/v4/letter/i/f08c70/32.png) [@Inkidu](https://community.plotly.com/u/Inkidu)\
**Post date:** [April 24, 2018, 2:57pm UTC](https://community.plotly.com/t/error-loading-dependencies-security-settings-problem/9867/3 "2018-04-24T14:57:20Z")

</div>

Thanks a lot, I blindly installed the latest versions without considering they may not have been the latest stable version. Fixed now. Looking forward to explore Dash!