Virtual backgroud doesn't work on windows 10

I can’t define the shape of a person with the background. The background itself is working alone, but when I make my appearance the background disappears or my shape it turns d

iffuse.
I have a white sheet as a background on the wall.

Windows 10 64 bits
Intel core i7-5500U CPU
2.40GHz
AMD Radeon R7 M260
Intel® HD Graphics 5500

I have a similar issue and am using the free version. Can’t get other tools to work.