Starting tomcat v9.0 server at localhost has encountered a problem

In this video you will get Solution for the
error1 - Starting tomcat v9.0 server at localhost has encountered a problem
The server cannot be started because one or more of the ports are invalid

error2 - Starting tomcat v9.10 server at localhost has encountered a problem - Port 8080 required by tomcat v9.0 at localhost is already in use. The server may already be running in another process or a system process may be using the port