not have ClickablePoint for my button

[erkantaylan]

I have a button like

...
<Button Uid="refresh">
    <StackPanel>
        <icon/>
       <textblock/>
    </StackPanel>
</Button>
...

test code

...
Application medicine = new Application("path/to/my/program.exe");
medicine.Start("-m");
ByProperty winFinder = By.Uid("shell").AndType(ControlType.Window);
CruciatusElement win = CruciatusFactory.Root.FindElement(winFinder);

CruciatusElement btn = win.FindElementByUid("refresh");
btn.Click(MouseButton.Left);
btn.Click(MouseButton.Left);
...

test results

[14:36:08] [Debug] Element 'type: ControlType.Button, uid: refresh' not have ClickablePoint
[14:36:09] [Info] Click on 'type: ControlType.Button, uid: refresh' element at (-817.5, 272) BoundingRectangle center

Why cannot click it? My test project is .Net 4.6.2 and my program is .Net 4.0