Tomcat exception: The Tomcat server configuration at \ Servers \ Tomcat v9.0 Server at localhost-c, serverslocalhost-c

Tomcat exception: The Tomcat server configuration at \ Servers \ Tomcat v9.0 Server at localhost-c, serverslocalhost-c

Today, when I wrote several Java engineering projects using Eclipse java EE and then wrote the jsp page of the java EE Project, Tomcat encountered this exception:

Solution:

On the menu bar Window --> Preferences --> Server --> Runtime Environments, Remove the configured Tomcat from the list, Add it again, and run the java EE Project again. eclipse returns to normal.