NFA may give errors if a user called "admin" does not exist.
In the Manager Service Log you find:
15:17:36 1 - Report Scheduler - :
An entity could not be initialized because exactly one row was not returned
from the underlying query.
NetQoS.Business.i18nEntityInitializationException: An entity could not be
initialized because exactly one row was not returned from the underlying
databaseEntity, DataTable table)
at NetQoS.ReporterAnalyzer.Business.User.GetByName(String name)
at NetQoS.ReporterAnalyzer.Business.ReportScheduleItem.Set(DataRow dr)
utcNow, Double minutesOverdue)