Plex-Meta-Manager/docs/home/guides/wt/wt-04.md

Now you’ll see some more activity in the Plex connection section:

$ docker run --rm -it -v "/Users/mroche/plex-meta-manager:/config:rw" meisnate12/plex-meta-manager --run
...
| Connecting to Plex Libraries...
...
| Connecting to Main Movies Library...
...
| Loading Metadata File: config/Movies.yml
|
| YAML Error: File Error: File does not exist config/Movies.yml
...
| Metadata File Error: No valid metadata files found
|
| Main Movies Library Connection Failed
...

PMM may start cataloging your movies at this point; you can hit control-C to stop that if it's happening.

We can see there that it connected to the Plex Library but failed to find that Movies.yml metadata file.

So far so good.