Why avast closes the scan without showing the result screen?

Hi, It is of recent issue. When i scan with avast wifi inspector, the scan would go and scan the devices connected, but the result screen would vanish in a bit of flash and then i could not know , exactly what is the result. I will try another scan with the same result.
This issue is of recent times. I tried to go to control panel to resort to repair avast. The repair avast would complete, but the scan would go on until results are not shown , with a flash the screen would popup , the beginning screen

same here