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Google Colab local runtime connecting error

I want to connect Google Colab to my local jupyter runtime. I installed the below extension as suggested by colab.
pip install --upgrade jupyter_http_over_ws>=0.0.7 && jupyter serverextension enable --py jupyter_http_over_ws
Then I run the command and started a jupyter notebook. After that I try to connect google colab to the local runtime with the prompted URL. But then I got the follow issue. Please help me to solve this.
F:\Education\SEMESTER 7\CO421 FINAL YEAR PROJECT\PROJECT\josh>jupyter notebook --NotebookApp.allow_origin='https://colab.research.google.com'--port=8888 --NotebookApp.port_retries=0
jupyter_http_over_ws extension initialized. Listening on /http_over_websocket
[I 12:01:45.043 NotebookApp] Serving notebooks from local directory: F:\Education\SEMESTER 7\CO421 FINAL YEAR PROJECT\PROJECT\josh
[I 12:01:45.043 NotebookApp] Jupyter Notebook 6.1.4 is running at:
[I 12:01:45.043 NotebookApp] http://localhost:8888/?token=9308f0fdb2a8ebe003eec56aa2684dfb7c51c873ba0d9214
[I 12:01:45.043 NotebookApp] or http://127.0.0.1:8888/?token=9308f0fdb2a8ebe003eec56aa2684dfb7c51c873ba0d9214
[I 12:01:45.043 NotebookApp] Use Control-C to stop this server and shut down all kernels (twice to skip confirmation).
[C 12:01:45.125 NotebookApp]
To access the notebook, open this file in a browser:
file:///C:/Users/prasa/AppData/Roaming/jupyter/runtime/nbserver-6268-open.html
Or copy and paste one of these URLs:
http://localhost:8888/?token=9308f0fdb2a8ebe003eec56aa2684dfb7c51c873ba0d9214
or http://127.0.0.1:8888/?token=9308f0fdb2a8ebe003eec56aa2684dfb7c51c873ba0d9214
[W 12:02:15.646 NotebookApp] Blocking Cross Origin API request for /http_over_websocket. Origin: https://colab.research.google.com, Host: localhost:8888
[W 12:02:15.647 NotebookApp] 403 GET /http_over_websocket?min_version=0.0.7&jupyter_http_over_ws_auth_url=http%3A%2F%2Flocalhost%3A8888%2F%3Ftoken%3D5d6bb0b08b718df4fMUpVa4LvtUpaHGkcUqPkMpyiaoG8817 (::1) 2.99ms referer=None

Can not open jupyter notebook in localhost in ubuntu

I didn't run jupyter notebook for a long time, Today when I try to launch to notebook , I can't run it and I encountered this:
[I 19:05:29.939 NotebookApp] 0 active kernels
[I 19:05:29.939 NotebookApp] The Jupyter Notebook is running at:
[I 19:05:29.939 NotebookApp] http://localhost:9999/
[I 19:05:29.939 NotebookApp] Use Control-C to stop this server and shut down all kernels (twice to skip confirmation).
Opening in existing browser session.
Then can not open in browser. I looked up other similar question but I didn't find to solution.

Jupyter notebook shows blank page in browser

I am launching a Jupyter notebook from an Anaconda environment (Python 3.6.8) on Windows 10 and when I do that the page that's displayed in my Chrome browser is totally blank.
The output in the console (git bash) window looks like this:
$ jupyter notebook object_detection_tutorial.ipynb
[I 13:18:13.500 NotebookApp] Serving notebooks from local directory: C:\home\git\object_detection_tensorflow\TensorFlow\models\research\object_detection
[I 13:18:13.500 NotebookApp] The Jupyter Notebook is running at:
[I 13:18:13.500 NotebookApp] http://localhost:8888/?token=bfb419ee35f8fd9800621e52dc8d73515990e2298148135b
[I 13:18:13.500 NotebookApp] Use Control-C to stop this server and shut down all kernels (twice to skip confirmation).
[C 13:18:13.513 NotebookApp]
To access the notebook, open this file in a browser:
file:///C:/Users/James%20Adams/AppData/Roaming/jupyter/runtime/nbserver-2808-open.html
Or copy and paste one of these URLs:
http://localhost:8888/?token=bfb419ee35f8fd9800621e52dc8d73515990e2298148135b
If I copy and paste the URL listed above into the Chrome browser address bar I get a normal looking response in the console but the same blank page in the browser:
[I 13:21:17.840 NotebookApp] 302 GET /?token=bfb419ee35f8fd9800621e52dc8d73515990e2298148135b (::1) 0.99ms
I have tried a number of things with no different result so far:
clear the browser's cache and cookies
downgraded the notebook module to 5.7.4 (conda install notebook=5.7.4)
used a different browser (Firefox)
What else can I try to fix this?

Jupyter Notebook Kernel busy all the time

I have instaled anaconda and python works fine in Sypder , IPython etc . However I am not able to run python notebook.
Kernel gets created , it also connects but it shows the dark circle busy symbol throughout . There is no problem with the firewall or antivirus .
I have tried by disabling both .
I am also not able to open python terminal from notebook there is some powershell error.
Can anyone suggest something ?
Edit 1 : Added the snapshot and the log
Log Anaconda Prompt :
(base) C:\Users\Project>jupyter notebook
[I 13:11:26.561 NotebookApp] JupyterLab extension loaded from C:\Users\Project\A
naconda3\lib\site-packages\jupyterlab
[I 13:11:26.561 NotebookApp] JupyterLab application directory is C:\Users\Projec
t\Anaconda3\share\jupyter\lab
[I 13:11:26.569 NotebookApp] Serving notebooks from local directory: C:\Users\Pr
oject
[I 13:11:26.570 NotebookApp] The Jupyter Notebook is running at:
[I 13:11:26.570 NotebookApp] http://localhost:8888/?token=28e7406ee648d631648f9b
8c53e1f3027f5eb30516ccf15f
[I 13:11:26.571 NotebookApp] Use Control-C to stop this server and shut down all
kernels (twice to skip confirmation).
[C 13:11:26.768 NotebookApp]
To access the notebook, open this file in a browser:
file:///C:/Users/Project/AppData/Roaming/jupyter/runtime/nbserver-3064-o
pen.html
Or copy and paste one of these URLs:
http://localhost:8888/?token=28e7406ee648d631648f9b8c53e1f3027f5eb30516c
cf15f
[I 13:11:56.237 NotebookApp] Creating new notebook in
[I 13:12:02.401 NotebookApp] Kernel started: 55d8fb5e-2fe7-4d4b-a1d3-a11b0b7e7e7
d
[I 13:12:05.242 NotebookApp] Adapting to protocol v5.1 for kernel 55d8fb5e-2fe7-
4d4b-a1d3-a11b0b7e7e7d
And the image where kernel is always busy
kernel busy

I was also getting the same issue, I tried a lot of different stuff but nothing seemed to help me out. Ultimately, a Kernel Restart instead of Kernel Interrupt helped me out! The kernel restarted and I was able to run the kernels as usual.
I think this is just a workaround if someone finds the real solution please do let us know!

I has the same issue because I started it as below
jupyter notebook --gateway-url=http://my-domain.com:8888
but I remove geteway-url param then the issue was gone
I know that you didn't make this very same mistake like me but I hope this gives you some clues

Jupyter Notebook is not being opened in windows using Anaconda Prompt?

1) I tried to open Jupyter Notebook in Anaconda prompt.
Ananconda Prompt:
(C:\Users\sankarreddy\Anaconda3) C:\Users\sankarreddy>jupyter notebook
[I 21:24:52.854 NotebookApp] Serving notebooks from local directory: C:\Users\sankarreddy
[I 21:24:52.855 NotebookApp] 0 active kernels
[I 21:24:52.856 NotebookApp] The Jupyter Notebook is running at: http://localhost:8888/?token=fb39c20421e31cc66fddfd4fc00c7f64b8003bc53b83f461
[I 21:24:52.856 NotebookApp] Use Control-C to stop this server and shut down all kernels (twice to skip confirmation).
[C 21:24:52.868 NotebookApp]
Copy/paste this URL into your browser when you connect for the first time,
to login with a token:
http://localhost:8888/?token=fb39c20421e31cc66fddfd4fc00c7f64b8003bc53b83f461
2) My default browser is Google chrome and every time when I try to open the Jupyter notebook, the following is the result.
Result in the Browser(Google Chrome):
ERROR: Gateway Timeout
While trying to retrieve the URL http://localhost:8888/tree?token=4f3786890eceb91493af9bd6f4b07ae1ac6888c6172bbfca:
Connection refused
Your cache administrator is webmaster.
Generated Sun, 23 Jul 2017 14:01:21 GMT by 103.217.212.129 (Mikrotik HttpProxy)
3) I interrupted the process using 'Ctrl+C'.. it displays as follows.
[I 19:43:23.364 NotebookApp] Interrupted...
[I 19:43:23.365 NotebookApp] Shutting down kernels
I have googled about this issue, but had very little help which is of no use.

It seems like you're trying to open Jupyter Notebook in port 8888 as stated by the error message While trying to retrieve the URL http://localhost:8888/tree?token=4f3786890eceb91493af9bd6f4b07ae1ac6888c6172bbfca
But, when running Jupyter Notebook, there was an error message stating something else is running in port 8888 and it started the server in the next available port, which is 8889: [I 19:26:39.239 NotebookApp] The Jupyter Notebook is running at: http://localhos t:8889/?token=86664b50ba28f3bd3431554bc84d60d8bf4f3bf4209a4ecf
I'm not sure how to identify what is running on 8888, but you should definitely access your Jupyter Notebook on localhost:8889 .