2 ways to fix:
1. With installation wizard , on section shutdown port number need to be set to -1
2. Manually edit conf file in tomcat run-time environment, ( Example : /runtime/apache-tomcat-8.5.31/conf/server.xml) , ensure that line look like this: <Server port="-1" shutdown="SHUTDOWN">
and start the web client task again
After updating the server.xml, the web client task should work again.