The app gets uploaded using CF but does not show any talents information - log shows the error below

[biploabray]

127050 [http-nio-8080-exec-1] INFO org.apache.wink.server.internal.RequestProcessor - The following error occurred during the invocation of the handlers chain: WebApplicationException (404 - Not Found) with message 'null' while processing GET request sent to http://tmlab4test.au-syd.mybluemix.net/api/people

when i change the api call to v3 instead of v2 like this --
public static final String WATSON_PROF_API = "/v3/profile";
public static final String WATSON_VIZ_API = "/v3/visualize";

i get the error below -

APP/0SLF4J: Actual binding is of type [org.slf4j.impl.JDK14LoggerFactory]Apr 4, 2017 4:10:06 PM
APP/0log4j:WARN Please initialize the log4j system properly.Apr 4, 2017 4:10:07 PM
APP/0log4j:WARN No appenders could be found for logger (org.apache.http.impl.client.cache.CachingHttpClient).Apr 4, 2017 4:10:07 PM
APP/0log4j:WARN See http://logging.apache.org/log4j/1.2/faq.html#noconfig for more info.

any help will be appriciated...