ReadyNas photos sharing problem

This is the error that I am receiving:

Type: INTERNAL SERVER ERROR
Requested URI: /go/aep/
Description:

java.net.SocketException: Unexpected end of file from server
at sun.net.www.http.HttpClient.parseHTTPHeader(HttpClient.java:769)
at sun.net.www.http.HttpClient.parseHTTP(HttpClient.java:632)
at sun.net.www.http.HttpClient.parseHTTPHeader(HttpClient.java:766)
at sun.net.www.http.HttpClient.parseHTTP(HttpClient.java:632)
at sun.net.www.protocol.http.HttpURLConnection.getInputStream(HttpURLConnection.java:1072)
at java.net.HttpURLConnection.getResponseCode(HttpURLConnection.java:373)
at com.pramati.bfly.cas.login.api.auth.AuthUtility.handleInterimAuthorization(AuthUtility.java:85)
at com.pramati.bfly.cas.login.api.auth.AuthUtil.handleEndPointUrlRequest(AuthUtil.java:150)
at com.pramati.bfly.cas.login.api.auth.filters.AuthFilter.handleEndpointRequest(AuthFilter.java:80)
at com.pramati.bfly.cas.login.api.auth.filters.AuthFilter.doFilter(AuthFilter.java:57)
at com.pramati.web.servlet.core.PramatiFilterChainImpl.invokeTargetFilter(PramatiFilterChainImpl.java:243)
at com.pramati.web.servlet.core.PramatiFilterChainImpl.doFilter(PramatiFilterChainImpl.java:160)
at com.pramati.bfly.cas.util.i18n.LocaleFilter.doFilter(LocaleFilter.java:60)
at com.pramati.web.servlet.core.PramatiFilterChainImpl.invokeTargetFilter(PramatiFilterChainImpl.java:243)
at com.pramati.web.servlet.core.PramatiFilterChainImpl.doFilter(PramatiFilterChainImpl.java:160)
at com.pramati.web.servlet.core.PramatiFilterChainImpl.startDoFilter(PramatiFilterChainImpl.java:120)
at com.pramati.web.interceptors.ServiceInterceptor.preProcess(ServiceInterceptor.java:114)
at com.pramati.web.interceptors.core.DefaultInterceptor.process(DefaultInterceptor.java:70)
at com.pramati.web.interceptors.core.InterceptorChainImpl.processNext(InterceptorChainImpl.java:48)
at com.pramati.web.interceptors.core.DefaultInterceptor.process(DefaultInterceptor.java:71)
at com.pramati.web.interceptors.core.InterceptorChainImpl.processNext(InterceptorChainImpl.java:48)
at com.pramati.web.interceptors.core.DefaultInterceptor.process(DefaultInterceptor.java:71)
at com.pramati.web.interceptors.core.InterceptorChainImpl.processNext(InterceptorChainImpl.java:48)
at com.pramati.web.interceptors.core.DefaultInterceptor.process(DefaultInterceptor.java:71)
at com.pramati.web.interceptors.core.InterceptorChainImpl.processNext(InterceptorChainImpl.java:48)
at com.pramati.web.interceptors.core.DefaultInterceptor.process(DefaultInterceptor.java:71)
at com.pramati.web.interceptors.core.InterceptorChainImpl.processNext(InterceptorChainImpl.java:48)
at com.pramati.web.interceptors.core.DefaultInterceptor.process(DefaultInterceptor.java:71)
at com.pramati.web.interceptors.core.InterceptorChainImpl.processNext(InterceptorChainImpl.java:48)
at com.pramati.web.interceptors.core.DefaultInterceptor.process(DefaultInterceptor.java:71)
at com.pramati.web.interceptors.core.InterceptorChainImpl.processNext(InterceptorChainImpl.java:48)
at com.pramati.web.interceptors.core.DefaultProcessContainer.process(DefaultProcessContainer.java:97)
at com.pramati.web.core.WorkerThread.processConnection(WorkerThread.java:289)
at com.pramati.web.core.WorkerThread.processConnection(WorkerThread.java:263)
at com.pramati.web.core.WorkerThread.run(WorkerThread.java:129)

Pramati Server running at mos5.readynasphotos.com:80.