Remoting using WebSocket fails with "Handshake response not received" Exception

io.jenkins.remoting.shaded.org.glassfish.tyrus.client.ClientManager <init>
CONFIG: Provider class loaded: io.jenkins.remoting.shaded.org.glassfish.tyrus.container.jdk.client.JdkClientContainer
hudson.remoting.jnlp.Main$CuiListener error
SEVERE: Handshake response not received.
io.jenkins.remoting.shaded.javax.websocket.DeploymentException: Handshake response not received.
	at io.jenkins.remoting.shaded.org.glassfish.tyrus.client.ClientManager$3$1.run(ClientManager.java:694)
	at io.jenkins.remoting.shaded.org.glassfish.tyrus.client.ClientManager$3.run(ClientManager.java:712)
	at java.base/java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:515)
	at java.base/java.util.concurrent.FutureTask.run(FutureTask.java:264)
	at io.jenkins.remoting.shaded.org.glassfish.tyrus.client.ClientManager$SameThreadExecutorService.execute(ClientManager.java:866)
	at java.base/java.util.concurrent.AbstractExecutorService.submit(AbstractExecutorService.java:118)
	at io.jenkins.remoting.shaded.org.glassfish.tyrus.client.ClientManager.connectToServer(ClientManager.java:511)
	at io.jenkins.remoting.shaded.org.glassfish.tyrus.client.ClientManager.connectToServer(ClientManager.java:355)
	at hudson.remoting.Engine.runWebSocket(Engine.java:624)
	at hudson.remoting.Engine.run(Engine.java:469)

[<Secret ID>, <Agent>, -url, https://<Master Host>:<Port>/, -webSocket, -workDir, <WorkDir Path> -headless, -noreconnect]