CFSM suddenly getting an error

[2024/05/24 10:00:32]: <ERROR> Save Search caused exception ...
[2024/05/24 10:00:32]: <ERROR> Unhandled.Exception:
Source: CustomsForgeSongManager
Target: System.String get_ArtistTitleAlbum()
System.NullReferenceException: Object reference not set to an instance of an object.
   at CustomsForgeSongManager.DataObjects.SongData.get_ArtistTitleAlbum()
   at CustomsForgeSongManager.UControls.SongManager.<>c__DisplayClass41_0.<SearchCDLC>b__1(SongData x)
   at System.Linq.Enumerable.WhereListIterator`1.MoveNext()
   at System.Collections.Generic.List`1..ctor(IEnumerable`1 collection)
   at System.Linq.Enumerable.ToList[TSource](IEnumerable`1 source)
   at CustomsForgeSongManager.UControls.SongManager.SearchCDLC(String criteria)
   at CustomsForgeSongManager.UControls.SongManager.ClearSearch()
   at CustomsForgeSongManager.UControls.SongManager.UpdateToolStrip()
   at CustomsForgeSongManager.Forms.frmMain.LoadSongManager()
   at CustomsForgeSongManager.Forms.frmMain..ctor(DLogger myLog)
   at CustomsForgeSongManager.Program.RunApp()
   at CustomsForgeSongManager.Program.Main()