Avast User Interface Cannot Display Anything

I have installed Avast Pro Antivirus in my pc, when i try to open User Interface, it opened but doesn’t show anything, just a frame with white blank. Anyone know about it ?

Sorry for my language,
Thanks before,
Arifia Kasastra R

Avast Antivirus: Repair and reset Avast Antivirus
https://www.avast.com/faq.php?article=AVKB204#artTitle

When I try to uninstall Avast, I see the button for repair, and I click it, then I restart my PC. After that I open Avast User Interface again but that there still white blank :‘( :’( :cry:

You could try the latest beta: https://forum.avast.com/index.php?board=15