The underlying connection was closed: An unexpected error occurred on a receive. Session Relevance

Does any one have a reason as to why WebReports would throw the following error: The underlying connection was closed: An unexpected error occurred on a receive. when trying to execute the following session relevance.

unique values of (name of it  & "$x$" & source id of it as string  & "$x$" &  number of ((names of it , ((name of it) of bes computer groups whose (name of it = "Some Computer Group Name") of it)) of applicable computers of it) as string) of bes fixlets whose (name of site of it = "Some Site Name" AND fixlet flag of it = True AND globally visible flag of it = True)

After the error is thrown, WebReports needs to be restarted.

I wonder if it has something to do with the $ which can often denote a variable, like it is misinterpreting it.