Universal Media Server | Forum

Posted: **Fri Oct 09, 2026 5:37 am**

I have been trying to get the renderers so show up for many months now after over 10 years of using this software. I do not know what has happened but I have not had this problem for a long time.

Posted: **Fri Oct 09, 2026 12:20 pm**

I do see errors about the network interface being null

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DEBUG 2026-10-08 11:17:04.370 [main] net.pms.network.configuration.NetworkConfiguration Using forced address: 192.0.0.223
ERROR 2026-10-08 11:17:04.376 [main] net.pms.PMS A serious error occurred during Universal Media Server initialization: Cannot invoke "java.net.NetworkInterface.isUp()" because "tmpNetworkInterface" is null
DEBUG 2026-10-08 11:17:04.376 [main] net.pms.PMS 
java.lang.NullPointerException: Cannot invoke "java.net.NetworkInterface.isUp()" because "tmpNetworkInterface" is null
	at net.pms.network.configuration.NetworkConfiguration.getNetworkInterfaceAssociationFromConfig(NetworkConfiguration.java:682)
	at net.pms.network.mediaserver.MediaServer.init(MediaServer.java:58)
	at net.pms.network.mediaserver.MediaServer.start(MediaServer.java:81)
	at net.pms.PMS.init(PMS.java:437)
	at net.pms.PMS.createInstance(PMS.java:1011)
	at net.pms.PMS.main(PMS.java:962)

In your UMS.conf there is no setting for network_interface so UMS should auto detect but I think the problem is you have set a forced IP address that may not be available on any network interface so is returning the null result.

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# Force IP of the Media Server
# ----------------------------
# A network interface can have multiple IP addresses associated with it.
# This sets which one should be used.
# Default: "", which means UMS will automatically select an IP address.
hostname = 192.0.0.223

This does not look right for a local network IP as it usually is 192.168.x.x but I know little about networking and how IPs are assigned.

There is an available interface on 10.0.0.223 and the IP you used was maybe a typo. I know 10.0.0.x is another way of having local IPs.

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checking wlan2(5), display name: Intel(R) Wi-Fi 6E AX211 160MHz
available addresses for wlan2 is: [/10.0.0.223]

Try removing the forced IP so UMS can automatically detect it.

Universal Media Server | Forum

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Re: renderers