If Tomcat9 installs with JDK13, the JAVA_HOME does not find it. Please modify /usr/libexec/tomcat9/tomcat-locate-java.sh Line 17 org : for java_version in 11 10 9 8 new : for java_version in 13 12 11 10 9 8 thanks.
tomcat-locate-java.sh is not part of the Tomcat distribution provided by the ASF. You need to raise this bug with whoever provided that file - probably the maintainer of the Linux distribution you are using.