Webui chef server not working

I downloaded and installed the chef-server-core_12.x

DPKG package onubuntu 13.x

chef-server-ctl reconfigure

successfully completed

but when i try the url http://chef.example.com

i get the following page with the message chef server API

thats all i didn't find any login information and so on. How can I get the webui interface, is there anything I missed?

Chef Server API

This is the main endpoint for all of the Chef API's. In general, none of these have any HTML representations, and the vast majority of them require that you are sending properly authenticated requests. So while it neat that you came to visit, you probably won't find what you are looking for here.

You can manage your organization infrastructure interactively using the Chef Management Console

      

        
        
        
      

    

There is a service status here

root@example.com# chef-server-ctl status
run: bookshelf: (pid 29813) 308s; run: log: (pid 29205) 339s
run: nginx: (pid 29967) 305s; run: log: (pid 29553) 316s
run: oc_bifrost: (pid 29574) 313s; run: log: (pid 28940) 358s
run: oc_id: (pid 29610) 313s; run: log: (pid 29012) 347s
run: opscode-erchef: (pid 29915) 306s; run: log: (pid 29202) 339s
run: opscode-expander: (pid 29705) 310s; run: log: (pid 29069) 341s
run: opscode-expander-reindexer: (pid 29773) 308s; run: log: (pid 29071) 341s
run: opscode-solr4: (pid 29658) 311s; run: log: (pid 29066) 341s
run: postgresql: (pid 29561) 314s; run: log: (pid 28605) 379s
run: rabbitmq: (pid 27631) 396s; run: log: (pid 27630) 396s
run: redis_lb: (pid 29498) 320s; run: log: (pid 29448) 322s