503 Service Unavailable

2021-06-23 09:24:04,832 : ERROR : Worker-2: Check for new licenses :  : BackgroundFetchLicensesJob :  :  : Error while fetching licenses from license server 'http://x-sknil01:8080/knime/rest': <HTML><TITLE>503 Service Unavailable</TITLE>
<H1>503 Service Unavailable</H1>
Failed to resolve the name of server <B>x-sknil01</B></HTML>

javax.ws.rs.ServiceUnavailableException: <HTML><TITLE>503 Service Unavailable</TITLE>
<H1>503 Service Unavailable</H1>
Failed to resolve the name of server <B>x-sknil01</B></HTML>

	at com.knime.enterprise.server.rest.providers.exception.ResponseToExceptionMapper.fromResponse(ResponseToExceptionMapper.java:115)
	at com.knime.enterprise.server.rest.providers.exception.ResponseToExceptionMapper.fromResponse(ResponseToExceptionMapper.java:1)
	at org.apache.cxf.jaxrs.client.ClientProxyImpl.checkResponse(ClientProxyImpl.java:306)
	at org.apache.cxf.jaxrs.client.ClientProxyImpl.handleResponse(ClientProxyImpl.java:763)
	at org.apache.cxf.jaxrs.client.ClientProxyImpl.doChainedInvocation(ClientProxyImpl.java:725)
	at org.apache.cxf.jaxrs.client.ClientProxyImpl.invoke(ClientProxyImpl.java:228)
	at com.sun.proxy.$Proxy54.checkoutLicense(Unknown Source)
	at com.knime.enterprise.server.rest.client.licenses.LicenseClient.checkoutLicenses(LicenseClient.java:130)
	at com.knime.licenses.internal.server.BackgroundFetchLicensesJob.internalRun(BackgroundFetchLicensesJob.java:133)
	at com.knime.licenses.internal.server.BackgroundFetchLicensesJob.run(BackgroundFetchLicensesJob.java:69)
	at org.eclipse.core.internal.jobs.Worker.run(Worker.java:63)
2021-06-23 09:24:17,345 : WARN  : Worker-0: Node Repository Loader :  : Node : Create File Name : 2:5:9 : Selected directory '/tmp/knime_tc_xtetjb4qa60h' cannot be accessed!
2021-06-23 09:24:17,430 : WARN  : Worker-0: Node Repository Loader :  : Node : Create File Name : 2:6:9 : Selected directory '/tmp/knime_tc_zitdr45yql9n' cannot be accessed!
2021-06-23 09:24:17,494 : WARN  : Worker-0: Node Repository Loader :  : Node : Create File Name : 2:7:9 : Selected directory '/tmp/knime_tc_dpmkgfdxmz9z' cannot be accessed!
2021-06-23 09:24:17,542 : WARN  : Worker-0: Node Repository Loader :  : Node : Create File Name : 2:8:9 : Selected directory '/tmp/knime_tc_h7cud7xffhnd' cannot be accessed!
2021-06-23 09:24:17,555 : WARN  : Worker-0: Node Repository Loader :  : SourceCodeTemplatesExtensions : Qed Calculator : 2:9 : Could not find templates folder templates/ in plugin org.knime.knip.knimepython
2021-06-23 09:24:17,603 : WARN  : Worker-0: Node Repository Loader :  : Node : Create File Name : 2:10:9 : Selected directory '/tmp/knime_tc_7ou5sryjnuqq' cannot be accessed!
2021-06-23 09:24:17,667 : WARN  : Worker-0: Node Repository Loader :  : Node : Create File Name : 2:11:9 : Selected directory '/tmp/knime_tc_q4y3pemd1mwb' cannot be accessed!