pure-pw error: Unable to open the passwd file: No such file or directory

I get this error when i want to run the following command: pure-pw list

Unable to open the passwd file: No such file or directory

I remove manually the folder /etc/pure-ftpd/ and I think this is the root of the problem. So i tried to regenerate it by reinstalling pure-ftpd, but i still don't have this folder.

Do you have any idea how to solve this issue?

Thanks a lot