GET chat/Users return json response Unexpected '<'

[4DvAnCeBoY]

On requesting api, it return html or in plain json response showing unexpected '<'.

Logs:

2017.02.23 22:54:32 org.jivesoftware.util.WebManager - Unexpected exception (which is ignored) while trying to obtain user.
java.lang.NullPointerException
at org.jivesoftware.util.WebManager.getUser(WebManager.java:147)
at org.jivesoftware.admin.AuthCheckFilter.doFilter(AuthCheckFilter.java:160)
at org.eclipse.jetty.servlet.ServletHandler$CachedChain.doFilter(ServletHandler.java:1652)
at com.opensymphony.module.sitemesh.filter.PageFilter.parsePage(PageFilter.java:118)
at com.opensymphony.module.sitemesh.filter.PageFilter.doFilter(PageFilter.java:52)
at org.eclipse.jetty.servlet.ServletHandler$CachedChain.doFilter(ServletHandler.java:1652)
at org.eclipse.jetty.servlet.ServletHandler.doHandle(ServletHandler.java:585)
at org.eclipse.jetty.server.handler.ScopedHandler.handle(ScopedHandler.java:143)
at org.eclipse.jetty.security.SecurityHandler.handle(SecurityHandler.java:577)
at org.eclipse.jetty.server.session.SessionHandler.doHandle(SessionHandler.java:223)
at org.eclipse.jetty.server.handler.ContextHandler.doHandle(ContextHandler.java:1127)
at org.eclipse.jetty.servlet.ServletHandler.doScope(ServletHandler.java:515)
at org.eclipse.jetty.server.session.SessionHandler.doScope(SessionHandler.java:185)
at org.eclipse.jetty.server.handler.ContextHandler.doScope(ContextHandler.java:1061)
at org.eclipse.jetty.server.handler.ScopedHandler.handle(ScopedHandler.java:141)
at org.eclipse.jetty.server.handler.ContextHandlerCollection.handle(ContextHandlerCollection.java:215)
at org.eclipse.jetty.server.handler.HandlerCollection.handle(HandlerCollection.java:110)
at org.eclipse.jetty.server.handler.HandlerWrapper.handle(HandlerWrapper.java:97)
at org.eclipse.jetty.server.Server.handle(Server.java:499)
at org.eclipse.jetty.server.HttpChannel.handle(HttpChannel.java:311)
at org.eclipse.jetty.server.HttpConnection.onFillable(HttpConnection.java:257)
at org.eclipse.jetty.io.AbstractConnection$2.run(AbstractConnection.java:544)
at org.eclipse.jetty.util.thread.QueuedThreadPool.runJob(QueuedThreadPool.java:635)
at org.eclipse.jetty.util.thread.QueuedThreadPool$3.run(QueuedThreadPool.java:555)
at java.lang.Thread.run(Thread.java:745)
2017.02.23 22:54:36 org.logicalcobwebs.proxool.openfire - Closing statement 3fa4cd86 (belonging to connection 2) automatically

[deleolajide]

Request

GET http://btg199251:7070/rest/api/restapi/v1/chat/users?search=deleo

with headers

authorization: ZGVsZW86V2VsY29tZTEyMw==
Accept: application/json
content-type: application/json

produces

{
	"user": {
		"username": "deleo",
		"name": "Dele Olajide",
		"properties": {
			"property": {
				"@key": "freeswitch.sip.embed",
				"@value": "false"
			}
		},
		"show": "offline"
	}
}

[salarmiii]

http://btg199251:7070/rest/api/restapi/v1/chat/users?search=deleo

[salarmiii]

http://btg199251:7070/rest/api/restapi/v1/chat/users?search=deleo