Volume mapping in Piwigo docker points to wrong directory?

I use the linuxserver docker image through Unraid
In the configuration there is a setting called Path: /gallery: which sets up a path to a directory in the docker called gallery.
But Piwigo seems to use the path /galleries, so none of my existing pictures shows up inside Piwigo

Isn’t the configuration in the linuxserver image wrong?
Shouldn’t the path point to /galleries and not to /gallery?