Object reference not set to an instance of an object.
at CharacterMap.ViewModels.FontMapViewModel.AddCharToSequence(Int32, Int32, Character) + 0x56
at CharacterMap.Views.FontMapView.<AddCharToSequence>d__99.MoveNext() + 0x97
--- End of stack trace from previous location where exception was thrown ---
at System.Runtime.ExceptionServices.ExceptionDispatchInfo.Throw() + 0x21
at System.Runtime.CompilerServices.AsyncMethodBuilderCore.<>c.<ThrowAsync>b__7_0(Object) + 0x1e
at System.Action`1.Invoke(T) + 0x28
at System.Threading.WinRTSynchronizationContext.Invoker.InvokeCore() + 0x33
OS Version: 10.0.19044.2486
OS Architecture: X64
App Version: 2023.5.0.0
App Culture: en-US
OS Version: 10.0.19044.2486 OS Architecture: X64 App Version: 2023.5.0.0 App Culture: en-US