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Unknown pattern character 'X'
java.lang.IllegalArgumentException: Unknown pattern character 'X'	at java.text.SimpleDateFormat.validatePatternCharacter(SimpleDateFormat.java:314)	at java.text.SimpleDateFormat.validatePattern(SimpleDateFormat.java:303)	at java.text.SimpleDateFormat.(SimpleDateFormat.java:356)	at com.google.gson.DefaultDateTypeAdapter.(DefaultDateTypeAdapter.java:51)	at com.google.gson.GsonBuilder.addTypeAdaptersForDate(GsonBuilder.java:555)	at com.google.gson.GsonBuilder.create(GsonBuilder.java:543)	at org.terasology.module.ModuleMetadataJsonAdapter.read(ModuleMetadataJsonAdapter.java:141)	at org.destinationsol.ModuleManager.(ModuleManager.java:49)	at org.destinationsol.SolApplication.create(SolApplication.java:79)	at com.badlogic.gdx.backends.android.AndroidGraphics.onSurfaceChanged(AndroidGraphics.java:243)	at android.opengl.GLSurfaceView$GLThread.guardedRun(GLSurfaceView.java:1511)	at android.opengl.GLSurfaceView$GLThread.run(GLSurfaceView.java:1239)