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ishabbi@Ishs-MacBook-Pro:~$ java -jar selenium-4alpha-custom.jar hub
09:51:23.063 INFO [EventBusConfig.createBus] - Creating event bus: org.openqa.selenium.events.zeromq.ZeroMqEventBus
09:51:23.149 INFO [BoundZmqEventBus.<init>] - XPUB binding to [binding to tcp://*:4442, advertising as tcp://fe80:0:0:0:841:a6e6:c8bc:4133%en0:4442], XSUB binding to [binding to tcp://*:4443, advertising as tcp://fe80:0:0:0:841:a6e6:c8bc:4133%en0:4443]
09:51:23.224 INFO [UnboundZmqEventBus.<init>] - Connecting to tcp://fe80:0:0:0:841:a6e6:c8bc:4133%en0:4442 and tcp://fe80:0:0:0:841:a6e6:c8bc:4133%en0:4443
Exception in thread "main" java.lang.IllegalArgumentException: Unable to find event bus class: org.openqa.selenium.events.zeromq.ZeroMqEventBus
	at org.openqa.selenium.grid.server.EventBusConfig.createBus(EventBusConfig.java:74)
	at org.openqa.selenium.grid.server.EventBusConfig.getEventBus(EventBusConfig.java:44)
	at org.openqa.selenium.grid.commands.Hub.lambda$configure$0(Hub.java:107)
	at org.openqa.selenium.grid.Main.launch(Main.java:123)
	at org.openqa.selenium.grid.Main.main(Main.java:100)
Caused by: java.lang.reflect.InvocationTargetException
	at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
	at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62)
	at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
	at java.lang.reflect.Method.invoke(Method.java:498)
	at org.openqa.selenium.grid.server.EventBusConfig.createBus(EventBusConfig.java:69)
	... 4 more
Caused by: org.zeromq.ZMQException: fe80:0:0:0:841:a6e6:c8bc:4133%en0 not found matching IPv4/IPv6 settings : errno 49
	at zmq.io.net.tcp.TcpAddress.resolve(TcpAddress.java:147)
	at zmq.io.net.tcp.TcpAddress.<init>(TcpAddress.java:40)
	at zmq.io.net.Address.resolve(Address.java:93)
	at zmq.SocketBase.connect(SocketBase.java:549)
	at org.zeromq.ZMQ$Socket.connect(ZMQ.java:3069)
	at org.openqa.selenium.events.zeromq.UnboundZmqEventBus.<init>(UnboundEventBus.java:67)
	at org.openqa.selenium.events.zeromq.BoundZmqEventBus.<init>(BoundZmqEventBus.java:63)
	at org.openqa.selenium.events.zeromq.ZeroMqEventBus.create(ZeroMqEventBus.java:35)
	at org.openqa.selenium.events.zeromq.ZeroMqEventBus.create(ZeroMqEventBus.java:51)
	... 9 more

Hi, I have same problem.
Could you tell me how to fix it?