no renderers found

[nmharleyrider]

No renderers found issue. I just installed version 15.4 but I am getting no renderers found. Something I have done wrong. I have been using UMS for many years so I am really confused about this.

[mik_s]

There was an error about a port being in use but this sometimes happens when creating logs as the previous UMS process has not fully stopped when the new one has started so I am ignoring it.

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ERROR 2026-09-29 09:55:26.410 [main] Unable to initialize network router
org.jupnp.transport.spi.InitializationException: Could not initialize UmsMulticastReceiver: java.net.BindException: Address already in use: bind
	at org.jupnp.transport.impl.MulticastReceiverImpl.init(MulticastReceiverImpl.java:92)
	at org.jupnp.transport.RouterImpl.startInterfaceBasedTransports(RouterImpl.java:379)
	at org.jupnp.transport.RouterImpl.enable(RouterImpl.java:126)
	at org.jupnp.UpnpServiceImpl.startup(UpnpServiceImpl.java:263)
	at net.pms.network.mediaserver.MediaServer.start(MediaServer.java:95)
	at net.pms.PMS.init(PMS.java:437)
	at net.pms.PMS.createInstance(PMS.java:1011)
	at net.pms.PMS.main(PMS.java:962)

The logs were also not in TRACE mode for some reason, it should have changed on the restart, so shows very little.

Try making new logs and just to make sure UMS starts in TRACE mode edit C:\ProgramData\UMS\UMS.conf when it is not running to add the setting

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log_level =trace

So it does not need to be restarted for logs.

I suspect the problem is firewall related on your system. The required Java version is being updated so that change may have caused the firewall/antivirus to block it even if it was allowed before.

There is also a newer version to use too. 15.8.2 is publicly available for download.

[mik_s]

Since your previous posts were the exact same thing and there was never any reply when trying to help, and spam was added to your profile I have banned this account.
There is a chance that the account was hijacked so kept the posts.

If this was genuine then make a new account and follow my instructions to post new logs.