The server cannot started because one or more of the ports are invalid [TomCat in Eclipse] : <p>When i open my file list-student.jsp. I experienced the following error:
"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. Open the server editor and correct invalid ports."</p>

<p>I tried to go server tab and change the port from 8080 to different number, but it doesnt work. I had the same problem before and i changed 8080 to another number liked 8181 and it worked, but today, even i tried to change port number and the problem cant be fixed.
Please see some pictures below for your reference
<a href="https://i.stack.imgur.com/NTmYW.png" rel="noreferrer">Changing port number</a></p>
