Als Ergänzung die Details der Fehlermeldung
<?xml version="1.0" encoding="UTF-8"?>
<jnlp spec="1.0+" codebase="
https://www.stellwerksim.de"
href="
https://www.stellwerksim.de/download-jn ... a44031499f">
<information>
<title>StellwerkSim</title>
<vendor>JS</vendor>
<homepage href="
http://www.js-home.org/" />
<description>Stellwerk Simulation</description>
<icon href="/sts1-minicut.jpg"/>
<shortcut online="false">
<desktop/>
<menu submenu="StellwerkSim.de"/>
</shortcut>
</information>
<security>
<all-permissions/>
</security>
<update check="always" policy="always" />
<resources>
<!-- Application Resources -->
<j2se version="1.8.0*" href="
http://java.sun.com/products/autodl/j2se" java-vm-args="-Dcom.sun.management.jmxremote" initial-heap-size="500M" />
<j2se version="9+" href="
http://java.sun.com/products/autodl/j2se" java-vm-args="--add-modules=java.xml.ws" initial-heap-size="500M" />
<jar href="Loader.jar" download="progress"/>
<jar href="sts.jar" main="true" download="eager"/>
<jar href="js-tools.jar" download="eager"/>
<jar href="STSQuery.jar" download="eager"/>
<jar href="flatlaf.jar" download="eager"/>
<!-- <jar href="flatlaf-themes.jar" download="eager"/> -->
<property name="jnlp.ircserver" value="bespin.stellwerksim.de"/>
<property name="jnlp.timeserver" value="bespin.stellwerksim.de"/>
<property name="jnlp.webserver" value="www.stellwerksim.de"/>
<property name="jnlp.service" value="
https://www.stellwerksim.de/soap.php"/>
<property name="jnlp.log" value="
www.stellwerksim.de/javalog.php"/>
<property name="jnlp.controlbot" value="sts-control"/>
<property name="jnlp.controlroomPrefix" value="#control"/>
<property name="jnlp.readyroom" value="#readyroom"/>
<property name="jnlp.readyroomchannels" value="#Lobby:Lobby;#quassel:Spielanfragen"/>
<property name="jnlp.mixfilterchannels" value="#Lobby"/>
<property name="jnlp.startchannel" value="#lobby"/>
</resources>
<application-desc
name="StellwerkSim"
main-class="js.java.schaltungen.stsmain"
width="300"
height="300">
<argument>0063a44031499f</argument>
<argument>18847</argument>
<argument>stwsim</argument>
</application-desc>
</jnlp>