On occasion, I have received the following ACL error: The working directory does not have write access permission (see below).
Simply said, it means: the working directory is not working; something is not write. :)
Seriously, the working directory is the directory in which the application wants to start, which is why it is also called the starting directory. This is the directory to which ACL expects you to save your ACL projects. That’s why ACL needs write access to that directory.