I installed Anaconda 3.7 on Ubuntu 18.04 (Bionic Beaver). Installation was successful. When I tried to start Jupyter Notebook from navigator it throws the following error.
Access to the file was denied The file at
file:///run/user/1000/jupyter/nbserver-26395-open.html is not
readable. It may have been removed, moved or file permissions may be
I think you have changed your default browser from Firefox to something else, Jupyter Notebook works fine on Firefox but throws permission denied on Chromium (for me). Just go to Setting > Details > Default Application and select FireFox in Web. Cheers