blessed-contrib uses Braille fonts which are available by default on Linux and Mac distributions but not on Windows:
In order to run such dashboards on windows you need to perform the following steps:
1. Download, open and install the FreeMono font.
2. Follow these instructions in order to to configure FreeMono in the windows terminal.
3. In the command line type: "set TERM=windows-ansi".
4. Clone & Run the blessed-contrib project according the regular guidelines (or run any other dashboard that you need)