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Power Monitoring Expert - when I try to generate any report, there is an error in the UI saying 'An error occurred while generating the report. Please see your system administrator'

Issue
When I try to generate a report, any report, there is an error in the browser. If I look in the EventException table in the ION_SystemLog, I will see an error like this:

An error has occurred during report processing. ---> System.Globalization.CultureNotFoundException: Culture is not supported.  Parameter name: culture  4096 (0x1000) is an invalid culture identifier.

Product Line
Power Monitoring Expert 8.x
Power Monitoring Expert 9.0

Environment
The Region in the Settings application in the web applications has been set to a custom culture, such as francais (Tunisie) or English (Sweden).

Cause
There is a known issue with the Microsoft Report Viewer control and custom cultures. See this link for more information:
 

https://social.msdn.microsoft.com/Forums/vstudio/en-US/671bc463-932d-4a9e-bba1-3e5898b9100d/culture-4096-0x1000-is-an-invalid-culture-identifier-culturenotfoundexception?forum=csharpgeneral

Resolution
Change the Region to something different to workaround this problem.
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