I now got past this error. I had to go through proxy, so I added proxy in settings.xml file and it worked.
Now I added a simple controller but still keep getting the error page:
Whitelabel Error Page
This application has no explicit mapping for /error, so you are seeing this as a fallback.
Wed Dec 27 12:51:37 CST 2017
There was an unexpected error (type=Not Found, status=404).
No message available
This is my controller:
I am trying to access
http://localhost:8080/hello. I see that the app is started
2017-12-27 12:51:23.358 INFO 24196 --- [ main] o.s.j.e.a.AnnotationMBeanExporter : Registering beans for JMX exposure on startup
2017-12-27 12:51:23.478 INFO 24196 --- [ main] s.b.c.e.t.TomcatEmbeddedServletContainer :
Tomcat started on port(s): 8080 (http)
2017-12-27 12:51:23.488 INFO 24196 --- [ main] com.example.demo.DemoApplication : Started DemoApplication in 5.157 seconds (JVM running for 5.665)