java.lang.module.FindException: Hash of javafx.base differs to expected hash intellij idea

I have recently encountered this error after recently updating Intellij Idea Community Edition. The JavaFX code has been written into the main class of a Java project.

This error is rather odd, as the code has run beautifully until now.  

I am currently attempting to system restore to a previous point.
Are there any suggestions in how to resolve this technical issue?

Please advise and thanks in advance,

Eran