SymptomsWeb statistics for a sub-domain is unavailable by incorrect links to the reports files.
Resolution1. It is necessary to install the latests Microsoft Visual C++ 2005 Redistributable Package (see the Microsoft article),
2. Then replace the %plesk_bin%\statistics.exe and %plesk_bin%\WebStatistics.dll files with the attachment. See the http://kb.sp.parallels.com/en/1802 article about hot-fix installation procedure.