Help !!! Viber !!!

The problem is this: I download Viber on my laptop (7 Windows), an activation window opens, but there is nothing else for the QR code, everything is white. 2 times I managed to activate it, but the next time I load Viber, no contacts, no chats, nothing, everything is white again. , I played enough with compatibility, the antivirus removed, nothing helps. With old versions, the same story. If anyone can help, I will be grateful. Thank you.