VMWARE VCAC question what does "Content is not allowed in prolog" means in the Cataina.out log in VCAC-APPLIANCE

Hello , can anyone tell me what the error "Content is not allowed in prolog" means in this error??


thanks !!!!!!!




SEVERE [tomcat-http--25] org.apache.shindig.gadgets.render.DefaultServiceFetcher.retrieveServices An HTTP 401 error occurred when fetching service methods from the https://vcac-core.xxc1.local/shell-ui-app/rpc endpoint.
26-Jan-2015 03:40:55.799 WARNING [pool-15-thread-12] org.apache.shindig.gadgets.AbstractSpecFactory.SpecUpdater An error occurred when updating https://vcac-core.xxc1.local/catalog-ui-self-service/selfservice/theme/Standard.css. Status code 500 was returned. Exception: org.apache.shindig.common.xml.XmlException: Content is not allowed in prolog. At: (1,1). A cached version is being used instead.
26-Jan-2015 04:23:07.759 SEVERE [tomcat-http--28] org.apache.shindig.gadgets.render.DefaultServiceFetcher.retrieveServices An HTTP 401 error occurred when fetching service methods from the https://vcac-core.xxxxx1.local/shell-ui-app/rpc endpoint.
26-Jan-2015 04:23:51.949 WARNING [pool-15-thread-20] org.apache.shindig.gadgets.AbstractSpecFactory.SpecUpdater An error occurred when updating https://vcac-core.xxc1.local/catalog-ui-self-service/selfservice/theme/Standard.css. Status code 500 was returned. Exception: org.apache.shindig.common.xml.XmlException: Content is not allowed in prolog. At: (1,1). A cached version is being used instead.
26-Jan-2015 04:47:11.028 WARNING [pool-15-thread-32] org.apache.shindig.gadgets.servlet.GadgetsHandlerService.createErrorResponse Error handling request:
 org.apache.shindig.auth.SecurityTokenException: Unknown container default
 


Thanks

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