Why is QMK Toolbox returning "dfu-programmer:no device present" when plugging in your board?

Some users may run into issues with QMK Toolbox when attempting to flash their PCB/keyboard with a customized keymapping. 

It may be the case that you assembled your keyboard, held ESC to put your keyboard into DFU mode, and, instead of recognizing your keyboard, saw the text shown in the picture below in the QMK console:
Link to Github Issue

In order to solve this issue, you will need to:

1) Navigate to the Tools tab in the menu bar of QMK toolbox

2) Click on Install Drivers... (shown below), this will reinstall the drivers
3) Now, you should be able to flash your keyboard normally