How do I configure Tomcat7 to run with Spring Tool Suite 3.4.0 on Linux Mint?

Hi:

I'm fairly new to the world of Spring Tool Suite, Linux and Tomcat.
I'm currently trying to add an instance of Tomcat v7.0 as a server to my project.
I walk through the wizard to create the server instance in STS.

When I go to "finish," I get the following error message:

Could not load the Tomcat server configruration at /Servers/Tomcat v7.0 Server at localhost.config. The configuration may be corrupt of incomplete.

Initially I received a configuration error that it could not load/locate the catalina policy/config file. I did a little research and ended up changing ownership for my install Tomcat7 directory from "root" to "myuser".  The change seemed to make the error go away.

I'm not sure if this in fact a Tomcat or Spring Tool Suite issue.
If I do a "ps -ef |grep tomcat". it looks like Tomcat7 is in deed running.

Can someone help me figure this out?

Thanks,
JohnB