Check the Apache Tomcat log files
The main Apache Tomcat configuration file is at /opt/bitnami/apache-tomcat/conf/server.xml.
Once Apache Tomcat starts, it will create several log files in the /opt/bitnami/apache-tomcat/logs directory. The main log file is the catalina.out file where you can find error messages. On some platforms, you may need root account privileges to view these files.