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Cannot Invoke java.awt.Image.getWidth(java.awt.image.ImageObserver because retVal is Null

Upon launching launcher_WINDOWS.bat, the following error appears. Exception in thread "AWT-EventQueue-0" java.lang.NullPointerException: Cannot invoke "java.awt.Image ...
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README.md

A timer app that allows you to star, stop or reset the timer Also you can choose the color of the clock, opens a new window that changes color every second, color that you can choose Countdown Java ...