I want to write the password and matrix keypad code.

I’m beginner.When I copy the example code and run it . It have many error following below
java.io.FileNotFoundException: C:\Users\GT101\AppData\Local\Temp\build4726567884196323376.tmp\sketch_dec24a.cpp (The system cannot find the path specified)
at java.io.FileOutputStream.open(Native Method)
at java.io.FileOutputStream.(FileOutputStream.java:179)
at java.io.FileOutputStream.(FileOutputStream.java:131)
at processing.app.preproc.PdePreprocessor.writePrefix(PdePreprocessor.java:139)
at processing.app.Sketch.preprocess(Sketch.java:1385)
at processing.app.Sketch.preprocess(Sketch.java:1334)
at processing.app.Sketch.build(Sketch.java:1580)
at processing.app.Sketch.build(Sketch.java:1562)
at processing.app.Editor$DefaultRunHandler.run(Editor.java:1899)
at java.lang.Thread.run(Thread.java:619)
processing.app.debug.RunnerException: Build folder disappeared or could not be written
at processing.app.Sketch.preprocess(Sketch.java:1392)
at processing.app.Sketch.preprocess(Sketch.java:1334)
at processing.app.Sketch.build(Sketch.java:1580)
at processing.app.Sketch.build(Sketch.java:1562)
at processing.app.Editor$DefaultRunHandler.run(Editor.java:1899)
at java.lang.Thread.run(Thread.java:619)

:o
and How to solved the error?
Thanks for any feedback!

Operating System?
IDE Version?
Type of install? (zip or installer)
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