I am starting jupyter notebook from the terminal, and am not using anaconda.
When I try to create a new python3 notebook I get this error message:
I have tried the method in this link Cannot open new Jupyter notebook permission denied
However the issue still persists.
You are in the home directory while creating a new python3 file on jupyter. To avoid the error just click on any of the folders listed(documents or downloads etc) other than home, now try creating a new python file again. It will do.