...What does this error mean?
Exception Details:
System.ArgumentOutOfRangeException: InvalidArgument=Value of '0' is not valid for 'SelectedIndex'.
Parameter name: SelectedIndex
at System.Windows.Forms.ComboBox.set_SelectedIndex(Int32 value)
at PKHeX.WinForms.Main.validateComboBox(Object sender)
at PKHeX.WinForms.Main.validateComboBox(Object sender, CancelEventArgs e)
at System.Windows.Forms.Control.OnValidating(CancelEventArgs e)
at System.Windows.Forms.ComboBox.OnValidating(CancelEventArgs e)
at System.Windows.Forms.Control.NotifyValidating()
at System.Windows.Forms.Control.PerformControlValidation(Boolean bulkValidation)
at System.Windows.Forms.Control.PerformContainerValidation(ValidationConstraints validationConstraints)
at System.Windows.Forms.Control.PerformContainerValidation(ValidationConstraints validationConstraints)
at System.Windows.Forms.Control.PerformContainerValidation(ValidationConstraints validationConstraints)
at System.Windows.Forms.Control.PerformContainerValidation(ValidationConstraints validationConstraints)
at System.Windows.Forms.Control.PerformContainerValidation(ValidationConstraints validationConstraints)
at System.Windows.Forms.ContainerControl.ValidateChildren(ValidationConstraints validationConstraints)
at System.Windows.Forms.Form.ValidateChildren(ValidationConstraints validationConstraints)
at System.Windows.Forms.Form.ValidateChildren()
at PKHeX.WinForms.Main.preparePKM(Boolean click)
at PKHeX.WinForms.Main.clickSet(Object sender, EventArgs e)
at System.Windows.Forms.ToolStripItem.RaiseEvent(Object key, EventArgs e)
at System.Windows.Forms.ToolStripMenuItem.OnClick(EventArgs e)
at System.Windows.Forms.ToolStripItem.HandleClick(EventArgs e)
at System.Windows.Forms.ToolStripItem.HandleMouseUp(MouseEventArgs e)
at System.Windows.Forms.ToolStripItem.FireEventInteractive(EventArgs e, ToolStripItemEventType met)
at System.Windows.Forms.ToolStripItem.FireEvent(EventArgs e, ToolStripItemEventType met)
at System.Windows.Forms.ToolStrip.OnMouseUp(MouseEventArgs mea)
at System.Windows.Forms.ToolStripDropDown.OnMouseUp(MouseEventArgs mea)
at System.Windows.Forms.Control.WmMouseUp(Message& m, MouseButtons button, Int32 clicks)
at System.Windows.Forms.Control.WndProc(Message& m)
at System.Windows.Forms.ScrollableControl.WndProc(Message& m)
at System.Windows.Forms.ToolStrip.WndProc(Message& m)
at System.Windows.Forms.ToolStripDropDown.WndProc(Message& m)
at System.Windows.Forms.Control.ControlNativeWindow.OnMessage(Message& m)
at System.Windows.Forms.Control.ControlNativeWindow.WndProc(Message& m)
at System.Windows.Forms.NativeWindow.Callback(IntPtr hWnd, Int32 msg, IntPtr wparam, IntPtr lparam)
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User Message:
An unhandled exception has occurred.
You can continue running PKHeX, but please report this error.