Error running 'Tomcat 9': Can't find catalina.jar

This error message indicates that Tomcat 9 is not able to locate the catalina.jar file, which is a crucial component of the Tomcat server. There are several possible reasons why this error might occur, including:

1. The catalina.jar file is missing or has been deleted from the Tomcat installation directory.

2. The CLASSPATH environment variable is not set correctly, preventing Tomcat from locating the catalina.jar file.

3. The Tomcat installation directory is not included in the PATH environment variable, which can also prevent Tomcat from locating the catalina.jar file.

To resolve this issue, you can try the following steps:

1. Verify that the catalina.jar file is present in the Tomcat installation directory. If it is missing, you may need to reinstall Tomcat.

2. Check that the CLASSPATH environment variable is set correctly to include the Tomcat installation directory and the catalina.jar file.

3. Ensure that the Tomcat installation directory is included in the PATH environment variable.

4. Restart Tomcat and try running it again to see if the error has been resolved.

If none of these steps resolve the issue, you may need to seek further assistance from the Tomcat community or support team.