I tried the method given at: https://askubuntu.com/a/659742/1454335
If I am using: libreoffice --writer FinalProposal.odt
then, I am getting an error shown in this figure.
If I am using touch FinalProposal.odt && libreoffice --writer FinalProposal.odt
then, it is working fine and I am able to create new file.
I want to know, what am I doing wrong?