java.lang.IllegalArgumentException: URI is not hierarchical
at java.base/java.io.File.<init>(File.java:418)
at com.company.Sound.<init>(Sound.java:41)
at com.company.GameWindow.initComponents(GameWindow.java:374)
at com.company.GameWindow.<init>(GameWindow.java:145)
at com.company.Main.modoNormal(Main.java:33)
at com.company.Main.main(Main.java:24)
Al abrirlo en modo consola obtengo: