Hi @sushiljoshi
I saw that the repo was forked from one of my tutorials, that’s awesome!
The error seems to be due to an installation error of dependency libraries. I noticed that in your nifty-app.py file there were no reference to any packages mentioned in packages.txt
file. Thus, I’d suggest to delete the packages.txt file. Afterwards, please do a reboot and see if it works.
Hope this helps!