Here is the full exception:
System.IO.DirectoryNotFoundException: Could not find a part of the path 'D:\SteamLibrary\steamapps\workshop\content\Modules'.
at System.IO.__Error.WinIOError(Int32 errorCode, String maybeFullPath)
at System.IO.FileSystemEnumerableIterator`1.CommonInit()
at System.IO.FileSystemEnumerableIterator`1..ctor(String path, String originalUserPath, String searchPattern, SearchOption searchOption, SearchResultHandler`1 resultHandler, Boolean checkHost)
at System.IO.Directory.GetDirectories(String path)
at BetterExceptionWindow.ErrorWindow.AnalyseModules() in D:\dev\bannerlord-error-detector\ErrorWindow.vb:line 267
at BetterExceptionWindow.ErrorWindow.ErrorWindow_Load(Object sender, EventArgs e) in D:\dev\bannerlord-error-detector\ErrorWindow.vb:line 45
at System.Windows.Forms.Form.OnLoad(EventArgs e)
at System.Windows.Forms.Form.OnCreateControl()
at System.Windows.Forms.Control.CreateControl(Boolean fIgnoreVisible)
at System.Windows.Forms.Control.CreateControl()
at System.Windows.Forms.Control.WmShowWindow(Message& m)
at System.Windows.Forms.Control.WndProc(Message& m)
at System.Windows.Forms.Form.WmShowWindow(Message& m)
at System.Windows.Forms.NativeWindow.Callback(IntPtr hWnd, Int32 msg, IntPtr wparam, IntPtr lparam)