java.lang.NumberFormatException, Deserializion problem?

[gamer9-create]

java.lang.NumberFormatException: empty String
at java.base/jdk.internal.math.FloatingDecimal.readJavaFormatString(FloatingDecimal.java:1842)
at java.base/jdk.internal.math.FloatingDecimal.parseDouble(FloatingDecimal.java:110)
at java.base/java.lang.Double.parseDouble(Double.java:556)
at com.file.Parser.parseDouble(Parser.java:160)
at com.file.Parser.parseFloat(Parser.java:164)
at com.file.Parser.consumeFloatProperty(Parser.java:306)
at com.util.JMath.deserializeVector2f(JMath.java:72)
at com.dataStructure.Transform.deserialize(Transform.java:64)
at com.jade.GameObject.deserialize(GameObject.java:186)
at com.file.Parser.parseGameObject(Parser.java:94)
at com.jade.Scene.importLevel(Scene.java:172)
at com.jade.LevelScene.init(LevelScene.java:20)
at com.jade.Window.changeScene(Window.java:187)
at com.ui.buttons.TestLevelButton.clicked(TestLevelButton.java:65)
at com.ui.buttons.JButton.update(JButton.java:25)
at com.ui.JWindow.updateComponents(JWindow.java:190)
at com.ui.JWindow.update(JWindow.java:214)
at com.jade.LevelEditorScene.update(LevelEditorScene.java:155)
at com.jade.Window.update(Window.java:219)
at com.jade.Window.loop(Window.java:154)
at com.jade.Window.run(Window.java:58)
at com.main.Main.trueMain(Main.java:57)
at com.main.Main.main(Main.java:51)

When I clicked the "Test Level" button, this error message came out of nowhere and popped up.