Apologies Try these links - I must admit I have never had to troubleshoot web client logs in an appliance before, however I would suggest gather the log bundle and then open it up to see what logs it has to offer as a starting point.
More Log information: http://kb.vmware.com/selfservice/microsites/search.do?language=en_US&cmd=displayKC&externalId=1021806
I hope this is helpful, let me know what logs (using the first link I gave you) you can find with those names - similar or specifically logs\vsphere_client_virgo.log