"Couldn't find a file descriptor referring to the console" on Ubuntu bash on Windows

I have a problem with Bash on Ubuntu on Windows. If I type "open (filename)" on Mac terminal, it opens the file with the right program but if I try to use it on Windows bash, it says: "Couldn't find a file descriptor referring to the console". I have also tried xdg-open and gnome-open but none of them works. How can the issue be fixed, and how does the open command work?