TLJH is running and I can access a file
http://localhost/user/myUser/notebooks/Label%20reader/single_file_code.py.ipynb
nbviewer is running, I have started it with
python3 -m nbviewer --debug --no-cache --host=127.0.0.1 --base-url=http://localhost/user --no-check-certificate
Attempting to use nbviewer to display the file
localhost:5000/url/myUser/notebooks/Label reader/label_reader part 1.ipynb
generates a 404 : Not found error
I have also installed nbviewer via the docker image and I get a similar result. In that case
http://localhost:8080/url/localhost/user/myUser/notebooks/Label%20reader/label_reader%20part%201.ipynb
resulted in
400 : Bad Request
Failed to connect to localhost port 80: Connection refused
TLJH is definitely running on port 80