?
It looks like the underlying error is, DirectoryServicesCOMException: A local error has occurred.
It's obviously not helpful at all, but in searching for that exact text, there are so many things that it seems to be, or could be. I would suggest to search for that error and see what is relavent, and what isn't.
There are so many suggestions on how to fix it, from improperly configured AD permissions to obscure 2008R2-only settings.