Hi,
I'm having the same problem with 10.1 Release.
I tried to solve the problem (as suggested by Bernd) by reinstalling the server, but no luck. Yet, when I tried to connect to the manager after the failed setup of the site, the admin interface came up anyway. But I noticed, that the directory 'config-store\services\System\CachingTools.GPServer' was missing.
Any idea what's going on here?
Chris