Server error en pagina web

Al entrar en la pagina www.microsoft.es aparece esto:

Server Error in '/library' Application.
Compilation Error
Description: An error occurred during the compilation of
a resource required to service this request. Please
review the following specific error details and modify
your source code appropriately.
Compiler Error Message: CS1501: No overload for
method 'WebMetrixBug' takes '3' arguments

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