Scrolling resulting in 0 rows

I'm trying to get the names of all the members from a Facebook group. I've searched this forum and see that other people have done the same, but two problems:

  1. Using & modifying their sitemaps has only resulted in my not seeing any rows at all after clicking refresh.
  2. The scroll element selector doesn't scroll down until there are no more results, it only gets a fraction of the way there before stopping. I made the scroll delay 5,000ms and this issue still persisted.

Url: The url of the members page of any Facebook group you're in.

Sitemap:
{"_id":"fb_forum_3","startUrl":["https://www.facebook.com/groups/1226939497346094/members/"],"selectors":[{"id":"Scroll Down","type":"SelectorElementScroll","parentSelectors":["_root"],"selector":"._gse","multiple":true,"delay":"5000"},{"id":"Person Name","type":"SelectorText","parentSelectors":["Scroll Down"],"selector":"._60ri a","multiple":false,"regex":"","delay":0}]}