Ok, there are multiple communities by that name on different servers.
From lemmy.ml using the native web application on a desktop browser, it is showing me

So now we are back to suggesting that these two Instance servers are not correctly talking to each other if 'subscribe' will not complete and stays stuck 'pending'.
EDIT: now I can get it to subscribe, past "Pending". I have no idea what is gong on within these two servers, but I too see no content flowing.