Installing the virtual environment and packages:
sudo bash install.sh
Run app:
sudo bash run.sh
This module should have been installed with pip from requirements.txt while running install.sh.
But you can steel see error like this. If you see it, please install this module with following command:
For Ubuntu or other distros with apt: sudo apt-get install python3-tk
For Fedora or other distros with dnf: sudo dnf install python3-tkinter
Source: https://stackoverflow.com/questions/25905540/importerror-no-module-named-tkinter