Hi,
It is due to the exception : com.sap.tc.webdynpro.services.exceptions.WDRuntimeException: Failed to retrieve client for current request. Causing exception is nested.
It could be due to browser issues. Can you confirm whether you are using IE for accessing these urls. If its IE 8 then you can try to use 'Compatibility mode' and try again.
If you have installed this SAP system on windows server then you can try to access these urls from local IE and check if it works.
Please check and confirm.
Regards,
Mudasir.