[Python] Cannot open new Jupyter Notebook [Permission Denied]

I have installed Jupyter Notebook on ubuntu 16.04 using pip3. I can execute jupyter notebook command. It opens and shows a list of current path directories.

But I cannot create a new notebook(Python3). It says

Unexpected error while saving file: Deep Learning/NN/Untitled.ipynb [Errno 13] Permission denied: '/home/ubuntu/.local/share/jupyter/notebook_secret'
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