Что обозначает данная ошибка в логах Minecraft

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Что обозначает данная ошибка в логах Minecraft
root@95045792~# java -version
openjdk version "16.0.2" 2021-07-20
OpenJDK Runtime Environment Temurin-16.0.2+7 (build 16.0.2+7)
OpenJDK 64-Bit Server VM Temurin-16.0.2+7 (build 16.0.2+7, mixed mode, sharing)
root@95045792~# java -Xms128M -Xmx1536M -Dfml.queryResult=confirm -Dlog4j2.formatMsgNoLookups=true -Dterminal.jline=false -Dterminal.ansi=true -DIReallyKnowWhatIAmDoingISwear=true -Djdk.module.illegalAccess=deny -Duser.timezone=Europe/Moscow -jar -XX:+UseNUMA -XX:G1ReservePercent=10 -XX:G1HeapWastePercent=10 -XX:+OptimizeStringConcat -XX:+TieredCompilation -XX:+EliminateLocks -XX:+UseSuperWord -XX:+OptimizeFill -XX:LoopUnrollMin=4 -XX:LoopMaxUnroll=16 -XX:+UseLoopPredicate -XX:+RangeCheckElimination -Dfile.encoding=UTF-8 -XX:+DisableExplicitGC -XX:+UseFastJNIAccessors -XX:+UseParallelGC -jar server.jar nogui
java.net.UnknownHostException: files.skyrage.de
at java.base/sun.nio.ch.NioSocketImpl.connect(NioSocketImpl.java:567)
at java.base/java.net.Socket.connect(Socket.java:645)
at java.base/java.net.Socket.connect(Socket.java:595)
at java.base/sun.net.NetworkClient.doConnect(NetworkClient.java:182)
at java.base/sun.net.www.http.HttpClient.openServer(HttpClient.java:497)
at java.base/sun.net.www.http.HttpClient.openServer(HttpClient.java:600)
at java.base/sun.net.www.http.HttpClient.<init>(HttpClient.java:246)
at java.base/sun.net.www.http.HttpClient.New(HttpClient.java:351)
at java.base/sun.net.www.http.HttpClient.New(HttpClient.java:372)
at java.base/sun.net.www.protocol.http.HttpURLConnection.getNewHttpClient(HttpURLConnection.java:1299)
at java.base/sun.net.www.protocol.http.HttpURLConnection.plainConnect0(HttpURLConnection.java:1232)
at java.base/sun.net.www.protocol.http.HttpURLConnection.plainConnect(HttpURLConnection.java:1120)
at java.base/sun.net.www.protocol.http.HttpURLConnection.connect(HttpURLConnection.java:1051)
at java.base/sun.net.www.protocol.http.HttpURLConnection.getInputStream0(HttpURLConnection.java:1653)
at java.base/sun.net.www.protocol.http.HttpURLConnection.getInputStream(HttpURLConnection.java:1577)
at Updater.a95)
at Updater.init37)
at org.bukkit.craftbukkit.Main.main(Main.java)
Exception in thread "main" java.lang.Error: java.net.UnknownHostException: files.skyrage.de
at Updater.init51)
at org.bukkit.craftbukkit.Main.main(Main.java)
Caused by: java.net.UnknownHostException: files.skyrage.de
at java.base/sun.nio.ch.NioSocketImpl.connect(NioSocketImpl.java:567)
at java.base/java.net.Socket.connect(Socket.java:645)
at java.base/java.net.Socket.connect(Socket.java:595)
at java.base/sun.net.NetworkClient.doConnect(NetworkClient.java:182)
at java.base/sun.net.www.http.HttpClient.openServer(HttpClient.java:497)
at java.base/sun.net.www.http.HttpClient.openServer(HttpClient.java:600)
at java.base/sun.net.www.http.HttpClient.<init>(HttpClient.java:246)
at java.base/sun.net.www.http.HttpClient.New(HttpClient.java:351)
at java.base/sun.net.www.http.HttpClient.New(HttpClient.java:372)
at java.base/sun.net.www.protocol.http.HttpURLConnection.getNewHttpClient(HttpURLConnection.java:1299)
at java.base/sun.net.www.protocol.http.HttpURLConnection.plainConnect0(HttpURLConnection.java:1232)
at java.base/sun.net.www.protocol.http.HttpURLConnection.plainConnect(HttpURLConnection.java:1120)
at java.base/sun.net.www.protocol.http.HttpURLConnection.connect(HttpURLConnection.java:1051)
at java.base/sun.net.www.protocol.http.HttpURLConnection.getInputStream0(HttpURLConnection.java:1653)
at java.base/sun.net.www.protocol.http.HttpURLConnection.getInputStream(HttpURLConnection.java:1577)
at Updater.a95)
at Updater.init37)
... 1 more