For a Solr version 8.11.0 I did now an update to log4j2.24.2 by simply exchanging the 5 log4j*.jar files under "/opt/solr-8.11.0/server/lib/ext$". But after that solr doesn't respond with an error HTTP ERROR 404 Not Found URI: /solr/ STATUS: 404 MESSAGE: Not Found SERVLET: - Please help me.