Cannot instal OBB files


I don’t understand why, I can’t install my application on my phone. I’ve been trying for several days but I can’t find a solution. When I try to install it on my phone via the installer in the “astc” folder, I get an OBB error

If I try to install via the PlayStore, I get the error “Download failed because you may not have purchase this app”

I hope that someone get a solution -

Please, I need help !