PyCharm can't find docker-compose

I'm trying to follow these instructions - https://www.jetbrains.com/help/pycharm/docker.html - on a Mac.

My Docker project works at the command line, and I can launch the whole thing with "docker stack deploy -c docker-compose.yml <name>"

In PyCharm, both Docker plugins are installed and active. If I type `docker-compose -v` into the Terminal window inside Pycharm, I get the version 1.18.0, although it does warn that "an older version of the docker-py package may be polluting the namespace". It then recommends a series of pip commands to fix the issue, which don't work. But, docker-compose is there, anyway.

I added a Docker > Docker-compose configuration in Pycharm and pointed it to my docker-compose.yml file. But when I click Run, it says "Cannot run program "docker-compose" (in directory <my project directory>): error=2, No such file or directory.

Can anyone advise on why this is happening, and how to fix it?