Hi All,
We have the issue that when some users login to alfresco their dashboard is missing (It worked previously and stopped one day only for some). Showing the following error:

I see the dashboard.xml files are here /app:company_home/st:sites/cm:surf-config/cm
ages/cm:user/cm:username/cm:dashboard.xml but because cm:surf-config has aspect sys:hidden I cannot view the contents of this file.
Share.log error:
2017-02-07 08:20:43,982 ERROR [org.alfresco.web.site] [http-apr-8080-exec-14] org.springframework.web.util.NestedServletException: Request processing failed; nested exception is org.springframework.extensions.surf.exception.PlatformRuntimeException: 01$
org.springframework.extensions.surf.exception.PlatformRuntimeException: 01070000 Failed to init Request Context: Unable to initialise user during Request Context init. Probably a stale user Session.
at org.alfresco.web.site.SlingshotPageViewResolver.lookupPage(SlingshotPageViewResolver.java:70)
at org.springframework.extensions.surf.mvc.PageViewResolver.canHandle(PageViewResolver.java:144)
at org.springframework.web.servlet.view.UrlBasedViewResolver.createView(UrlBasedViewResolver.java:395)
at org.springframework.extensions.webscripts.servlet.mvc.AbstractWebScriptViewResolver.resolveViewName(AbstractWebScriptViewResolver.java:64)
at org.springframework.web.servlet.DispatcherServlet.resolveViewName(DispatcherServlet.java:1255)
at org.springframework.web.servlet.DispatcherServlet.render(DispatcherServlet.java:1196)
at org.springframework.web.servlet.DispatcherServlet.processDispatchResult(DispatcherServlet.java:1001)
at org.springframework.web.servlet.DispatcherServlet.doDispatch(DispatcherServlet.java:945)
at org.springframework.web.servlet.DispatcherServlet.doService(DispatcherServlet.java:867)
at org.springframework.web.servlet.FrameworkServlet.processRequest(FrameworkServlet.java:953)
at org.springframework.web.servlet.FrameworkServlet.doGet(FrameworkServlet.java:844)
at javax.servlet.http.HttpServlet.service(HttpServlet.java:620)
at org.springframework.web.servlet.FrameworkServlet.service(FrameworkServlet.java:829)
at javax.servlet.http.HttpServlet.service(HttpServlet.java:727)
at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:303)
at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:208)
at org.apache.tomcat.websocket.server.WsFilter.doFilter(WsFilter.java:52)
at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:241)
at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:208)
at org.alfresco.web.site.servlet.SecurityHeadersFilter.doFilter(SecurityHeadersFilter.java:189)
at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:241)
at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:208)
at org.alfresco.web.site.servlet.CSRFFilter.doFilter(CSRFFilter.java:322)
at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:241)
at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:208)
at org.alfresco.web.site.servlet.SSOAuthenticationFilter.doFilter(SSOAuthenticationFilter.java:457)
at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:241)
at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:208)
at org.alfresco.web.site.servlet.MTAuthenticationFilter.doFilter(MTAuthenticationFilter.java:81)
at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:241)
at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:208)
at org.apache.catalina.core.StandardWrapperValve.invoke(StandardWrapperValve.java:220)
at org.apache.catalina.core.StandardContextValve.invoke(StandardContextValve.java:122)
at org.apache.catalina.authenticator.AuthenticatorBase.invoke(AuthenticatorBase.java:504)
at org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java:170)
at org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:103)
at org.apache.catalina.valves.AccessLogValve.invoke(AccessLogValve.java:950)
at org.apache.catalina.core.StandardEngineValve.invoke(StandardEngineValve.java:116)
at org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.java:421)
at org.apache.coyote.http11.AbstractHttp11Processor.process(AbstractHttp11Processor.java:1074)
at org.apache.coyote.AbstractProtocol$AbstractConnectionHandler.process(AbstractProtocol.java:611)
at org.apache.tomcat.util.net.AprEndpoint$SocketProcessor.doRun(AprEndpoint.java:2466)
at org.apache.tomcat.util.net.AprEndpoint$SocketProcessor.run(AprEndpoint.java:2455)
at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1142)
at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:617)
at org.apache.tomcat.util.threads.TaskThread$WrappingRunnable.run(TaskThread.java:61)
at java.lang.Thread.run(Thread.java:745)
Caused by: org.springframework.extensions.surf.exception.RequestContextException: Unable to initialise user during Request Context init. Probably a stale user Session.
at org.springframework.extensions.surf.RequestContextUtil.initRequestContext(RequestContextUtil.java:118)
at org.springframework.extensions.surf.RequestContextUtil.initRequestContext(RequestContextUtil.java:61)
at org.alfresco.web.site.SlingshotPageViewResolver.lookupPage(SlingshotPageViewResolver.java:66)
... 46 more
Caused by: org.springframework.extensions.surf.exception.UserFactoryException: Unable to retrieve user from repository
at org.springframework.extensions.surf.support.AlfrescoUserFactory.loadUser(AlfrescoUserFactory.java:195)
at org.alfresco.web.site.SlingshotUserFactory.loadUser(SlingshotUserFactory.java:142)
at org.springframework.extensions.surf.support.AbstractUserFactory.initialiseUser(AbstractUserFactory.java:183)
at org.springframework.extensions.surf.support.AbstractUserFactory.initialiseUser(AbstractUserFactory.java:101)
at org.springframework.extensions.surf.RequestContextUtil.initialiseUser(RequestContextUtil.java:260)
at org.springframework.extensions.surf.RequestContextUtil.initRequestContext(RequestContextUtil.java:114)
... 48 more
Caused by: org.json.JSONException: A JSONObject text must begin with '{' at character 0
at org.json.JSONTokener.syntaxError(JSONTokener.java:410)
at org.json.JSONObject.<init>(JSONObject.java:179)
at org.json.JSONObject.<init>(JSONObject.java:402)
at org.alfresco.web.site.SlingshotUserFactory.constructUser(SlingshotUserFactory.java:122)
at org.springframework.extensions.surf.support.AlfrescoUserFactory.constructAlfrescoUser(AlfrescoUserFactory.java:288)
at org.springframework.extensions.surf.support.AlfrescoUserFactory.buildAlfrescoUser(AlfrescoUserFactory.java:256)
at org.springframework.extensions.surf.support.AlfrescoUserFactory.loadUser(AlfrescoUserFactory.java:190)
... 53 more
Please assist if you can.