Playframework - Hello World Tutorial (play.sbt.PlayExceptions$UnexpectedException: Unexpected exception[IOException: Cannot run program "javac")

Command:
sbt clean compile


Fail:
play.sbt.PlayExceptions$UnexpectedException: Unexpected exception[IOException: Cannot run program "javac"

Solution:

It was soooo weird, I've moved the folder and compile in this new one, then I moved the folder again to the first place and it works.

Regards,