Tomcat update instructions
Testing the Tomcat upgrade on a 9.3 instance & at step 9...
Open the \Yellowfin\appserver\conf\server.xml file and remove the lines below. Then save Listener className="org.apache.catalina.core.JasperListener"
...However, there is no reference to Jasper at all in the sever.xml file. Just want to double check that it's a case of if it's not there, don't worry about it.