Player.nextPlayable() is not null but after skipping the context exception throws.

[tarik0]

Hey, I am trying to skip the song If there is another context in the queue but nextPlayable() function is always returns null even tho there is no context to play in the queue.

After when I skip to the next context with Player.next() this exception pops up.

Exception in thread "ForkJoinPool.commonPool-worker-3" java.lang.IllegalStateException: Cannot set output for PlayerQueueEntry{0170d692ce39ac738bc6f517e38f755d}
    at xyz.gianlu.librespot.player.playback.PlayerQueueEntry.setOutput(PlayerQueueEntry.java:189)
    at xyz.gianlu.librespot.player.playback.PlayerSession.playInternal(PlayerSession.java:266)
    at xyz.gianlu.librespot.player.playback.PlayerSession.play(PlayerSession.java:281)
    at xyz.gianlu.librespot.player.Player.loadTrack(Player.java:254)
    at xyz.gianlu.librespot.player.Player.handleSkipNext(Player.java:469)
    at xyz.gianlu.librespot.player.Player.next(Player.java:134)
    at com.xxx.xxx.MachineEvents.lambda$onContextChanged$0(MachineEvents.java:57)
    at java.base/java.util.concurrent.ForkJoinTask$RunnableExecuteAction.exec(ForkJoinTask.java:1429)
    at java.base/java.util.concurrent.ForkJoinTask.doExec(ForkJoinTask.java:290)
    at java.base/java.util.concurrent.ForkJoinPool$WorkQueue.topLevelExec(ForkJoinPool.java:1016)
    at java.base/java.util.concurrent.ForkJoinPool.scan(ForkJoinPool.java:1665)
    at java.base/java.util.concurrent.ForkJoinPool.runWorker(ForkJoinPool.java:1598)
    at java.base/java.util.concurrent.ForkJoinWorkerThread.run(ForkJoinWorkerThread.java:183)

This is how the player configuration is made.

PlayerConfiguration playerConfig = new PlayerConfiguration.Builder()
                    .setInitialVolume(0)
                    .setAutoplayEnabled(false)
                    // .setInitialVolume(65536)
                    .setPreferredQuality(AudioQuality.NORMAL)
                    .setPreloadEnabled(false)
                    .setOutput(AudioOutput.MIXER)
                    .setVolumeSteps(5)
                    .build();
                    
                    
Player player = new Player(playerConfig, session);

At the librespot-org/spotify-connection-resources the author of this library @devgianlu said that I may have enabled the context looping but there is no configuration that I did for that. At below you can see how I load the contexts to the player.
First I'm checking for the current playable. If there is one I'll just add the context to the queue. If there is no context playing then I'm just loading the context and set auto play to true.

// Add uri to queue
try {
    machine.player.currentPlayable();
    machine.player.addToQueue(message.spotifyUri);
} catch (Exception s) {
    machine.player.load(message.spotifyUri, true);
}

Thanks for the help!