Processing "GUI Builder warning" when opening G4P GUI builder


I am having an issue with using G4P in processing, I have tried adding it through the add tools feature in processing, as well as installing it by adding it to the tools folder as instructed here (Quarks Place)
Yet every time I try to run the tool on processing I get this error message:

Any help would be much apreciated.

Open Processing and from menus Sketch > Add Library > Import Library install G4P with the Contributions Manager.

G4P is a library that provides all the controls, and GUI Builder is a tool that provides a graphical interface for designing GUI interfaces that use G4P.



Thanks so much for the quick response.

ahh that makes sense, this has been very helpful and it works now.

Thanks again, you legend