Error occured on Business Layer call. Type: System.ArgumentOutOfRangeException Message: 'Specified time is not supported in this calendar.

5/15/2024 11:05 AM

2/19/2025 6:16 PM

Customer freshly deployed SolarWinds Application on 2019 OS with System Locale - Arabic (unsupported officially but customer was not aware of this).
Application installed fine and web console is also up and running, however NetFlow & Alerting Services were restarting every few minutes.
Upon checking the logs for these services, we find same errors in both service log files and in Module engine logs.

ERROR SolarWinds.Orion.Core.Common.CoreErrorHandler - (null) Error occured on Business Layer call. Type: System.ArgumentOutOfRangeException
Message: 'Specified time is not supported in this calendar. It should be between 04/30/1900 00:00:00 (Gregorian date) and 11/16/2077 23:59:59 (Gregorian date), inclusive.
Parameter name: time'
ActualValue: ''
ParamName: 'time'
Data: 'System.Collections.ListDictionaryInternal'
InnerException: ''
TargetSite: 'Void CheckTicksRange(Int64)'
StackTrace: ' at System.Globalization.UmAlQuraCalendar.CheckTicksRange(Int64 ticks)
at System.Globalization.UmAlQuraCalendar.GetDatePart(DateTime time, Int32 part)
at System.Globalization.UmAlQuraCalendar.GetDayOfMonth(DateTime time)
at System.DateTimeFormat.FormatCustomized(DateTime dateTime, String format, DateTimeFormatInfo dtfi, TimeSpan offset)
at System.DateTimeFormat.Format(DateTime dateTime, String format, DateTimeFormatInfo dtfi, TimeSpan offset)
at System.DateTimeFormat.Format(DateTime dateTime, String format, DateTimeFormatInfo dtfi)
at System.DateTime.ToString(String format, IFormatProvider provider)
at System.Text.StringBuilder.AppendFormatHelper(IFormatProvider provider, String format, ParamsArray args)

We set OS locale settings to the one officially supported (English (UK or US)) on both SQL and App server and rebooted them, verified in regional settings via GUI and CLI.
You can check this via below PowerShell command.

Get-WinSystemLocale

Customer even re-deployed OS(they have no OS templates with default locale as English(UK/US). Again, the same issue.

Orion Platform

Calendar / Date is not set to Georgian for User Profile settings even though it is set correctly for OS.

You need to copy current user settings to new user accounts and welcome screen settings.