Viber GUI Transparent?

Hi,

i had this problem for a long time now, but it seems maybe VMWare is not aware of it so they are not fixing it with the updated versions.

I am running a Windows 10 VM, and have all applications installed that I use daily, and the problem is only with Viber. Its GUI is transparent and I cannot use it unless i minimize all other windows like Firefox for example. And my background hast to be black. See picture in attachment.

Thanks