Issues with labeling using the dlcgui

Hi , I am having problems while labeling data with DLC gui. It seems the extracted png files are grayed out.

Although the pngs are loaded , I am unable to click on the body part and label it. What could be the issue ?

The following steps were followed

  1. Activated DLC-GPU
  2. ipython
  3. import deeplabcut
  4. deeplabcut.dlc()
  5. Created a new project and added new videos succesfully
    Running it on ubuntu 18.04

Greyed pngs

A screenshot of the issue is shown below