Python dash gives me an "Error loading layout" how can I solve this?

Question

Hey i am new to Python Dash and I followed the https://dash.plot.ly/installation tutorial.

First I Installed all the libraries with pip in my cmd shell.

After that I created the app.py file and added this code:

import dash
import dash_core_components as dcc
import dash_html_components as html

external_stylesheets = ['https://codepen.io/chriddyp/pen/bWLwgP.css']

app = dash.Dash(__name__, external_stylesheets=external_stylesheets)

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)

So far no errors yet. When I start the server and go to http://127.0.0.1:8050 the webpage gives me an error: "Error loading layout".

I tried to figure it out with all the other reports for help but I still cant find the answer.

I hope someone can help me with this.

Thanks alot!

I am also wondering how one would go about debugging this... — Thomas

jojo.t.c jojo.t.c · Accepted Answer · 2019-01-11T18:20:03

I successfully ran this with no issue, so I would assume that it is an issue with one your modules being incomplete. Try re-installing all the underlying modules (dash, dcc, and html) via pip or conda and see if that clears up the issue.

Python dash gives me an "Error loading layout" how can I solve this?

1 Answers