Dash says that its loading onto my local host but i get nothing when i go to the hosted page

Question

import pandas as pd
import dash
from dash import dash_table
from dash import html
import dash_table.FormatTemplate as FormatTemplate

df = pd.read_csv('/content/SampleData.csv')
df.head()

pp = dash.Dash(__name__)
app.layout = html.Div(
    [
     html.H3("Example 1"),
     dash_table.DataTable(
         id="table",
         columns=[{"name": i, "id": i} for i in df.columns],
         data=df.to_dict("records"),
         style_table={"height": "200px", "overflowY" : "auto"},
     )
    ]
)

if __name__ == "__main__":
    app.run_server(debug= True, use_reloader=False, port = 8051)

I have tried using several different methods and no matter what i do it seems that it cannot load the local host. I am getting the "Dash is running on ...." but when i click the link it just says that the site cant be reached. I have tried disabling the debug as well as using different ports and disabling the reloader.

Any helpful comments would be appreciated. Could this just be related to me using google colab?