I've checked to make sure that Gradle directory has full access, and still receive the same error, even after restarting the system. What is "compileReleaseJavaWithJavac" ? That seems to be the culprit, here. Nothing I install or update, seems to fix whatever that is. It keeps spouting stuff about the GPG, but I can't, for the life of me, figure out what that has to do with anything.