Thanks for reaching us.
We have tested the plugin and all is working correctly.
Allow me to mention that you need to place all the plugin elements in your application, namely Picture Progress Bar, Progress Bar Info, Flat Progress Bar.
Please use our Live Demo Page and Bubble Editor of this plugin as an example for the correct configuration of all elements of the plugin:
If after replicating the settings you will face the same issue, please delete and reinstall the plugin in your application.
Hope it will help.