Commandline to execute test on Kobiton device

Hello,
I use the following command line to execute my test in Jenkins, on a Kobiton device.

sh 'cd /www/h5build/apps/build_server/katalon/Katalon_Studio_Linux_64-5.7.1 && xvfb-run -a ./katalon -noSplash -runMode=console -consoleLog -projectPath="${WORKSPACE}/test.prj" -statusDelay=60 -retry=0 -testSuitePath="Test Suites/kobtest" -kobitonDeviceId="12345" -executionProfile="default" -browserType="Kobiton Device" -kobiton.authentication.username="username" -kobiton.authentication.password="password" --config -proxy.option="MANUAL_CONFIG" -proxy.server.type="HTTP" -proxy.server.address="proxy.muc" -proxy.server.port="8080" -proxy.username="${USERNAME}" -proxy.password="${PASSWORD}" '

But I keep getting the same error, that the authentication kobiton system failed…

java.lang.RuntimeException: Authentication kobiton system failed !	at com.kms.katalon.integration.kobiton.preferences.KobitonPreferencesProvider.getKobitonToken(KobitonPreferencesProvider.java:61)	at com.kms.katalon.integration.kobiton.configuration.KobitonRunConfigurationContributor.setArgumentValue(KobitonRunConfigurationContributor.java:79)	at com.kms.katalon.execution.console.ConsoleExecutor.setValueForOptionalOptions(ConsoleExecutor.java:109)	at com.kms.katalon.execution.console.ConsoleExecutor.execute(ConsoleExecutor.java:61)	at com.kms.katalon.execution.console.ConsoleMain.launch(ConsoleMain.java:94)	at com.kms.katalon.console.application.Application.runConsole(Application.java:76)	at com.kms.katalon.core.application.Application.runConsole(Application.java:72)	at com.kms.katalon.core.application.Application.start(Application.java:56)	at org.eclipse.equinox.internal.app.EclipseAppHandle.run(EclipseAppHandle.java:196)	at org.eclipse.core.runtime.internal.adaptor.EclipseAppLauncher.runApplication(EclipseAppLauncher.java:134)	at org.eclipse.core.runtime.internal.adaptor.EclipseAppLauncher.start(EclipseAppLauncher.java:104)	at org.eclipse.core.runtime.adaptor.EclipseStarter.run(EclipseStarter.java:388)	at org.eclipse.core.runtime.adaptor.EclipseStarter.run(EclipseStarter.java:243)	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.eclipse.equinox.launcher.Main.invokeFramework(Main.java:673)	at org.eclipse.equinox.launcher.Main.basicRun(Main.java:610)	at org.eclipse.equinox.launcher.Main.run(Main.java:1519)	at org.eclipse.equinox.launcher.Main.main(Main.java:1492)Caused by: java.net.UnknownHostException: api.kobiton.com: Name or service not known	at java.net.Inet6AddressImpl.lookupAllHostAddr(Native Method)	at java.net.InetAddress$2.lookupAllHostAddr(InetAddress.java:928)	at java.net.InetAddress.getAddressesFromNameService(InetAddress.java:1323)	at java.net.InetAddress.getAllByName0(InetAddress.java:1276)	at java.net.InetAddress.getAllByName(InetAddress.java:1192)	at java.net.InetAddress.getAllByName(InetAddress.java:1126)	at org.apache.http.impl.conn.SystemDefaultDnsResolver.resolve(SystemDefaultDnsResolver.java:45)	at org.apache.http.impl.conn.DefaultHttpClientConnectionOperator.connect(DefaultHttpClientConnectionOperator.java:111)	at org.apache.http.impl.conn.PoolingHttpClientConnectionManager.connect(PoolingHttpClientConnectionManager.java:353)	at org.apache.http.impl.execchain.MainClientExec.establishRoute(MainClientExec.java:380)	at org.apache.http.impl.execchain.MainClientExec.execute(MainClientExec.java:236)	at org.apache.http.impl.execchain.ProtocolExec.execute(ProtocolExec.java:184)	at org.apache.http.impl.execchain.RetryExec.execute(RetryExec.java:88)	at org.apache.http.impl.execchain.RedirectExec.execute(RedirectExec.java:110)	at org.apache.http.impl.client.InternalHttpClient.doExecute(InternalHttpClient.java:184)	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:82)	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:107)	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:55)	at com.kms.katalon.integration.kobiton.providers.KobitonApiProvider.login(KobitonApiProvider.java:61)	at com.kms.katalon.integration.kobiton.preferences.KobitonPreferencesProvider.getKobitonToken(KobitonPreferencesProvider.java:52)	... 20 more

I guess the reason must be Jenkins maybe. Executing the test locally on a pc via command line works fine.
Any idea where the mistake is located?

The issue might be in the proxy settings, kobiton seems to not be accessible through proxy?
Any way to still menage this?