I am having the same problem. Using SNAP version 2.7.15
I am using Disqus to manage my comments. Disqus sees the comments from FB being imported but gets an error during the import.
Missing thread permalink or identifier {“post”: {“author_email”: “XXXX7377853@facebook.com”, “author_name”: “XXXX”, “original_id”: “192”, “author_url”: “https://www.facebook.com/XXXX”, “date”: “2013-06-23T01:38:55UTC”, “is_linkback”: false, “message”: “I really enjoy your photography.”, “ip_address”: “255.255.255.255”, “approved”: true, “metadata”: “wp_id=192”}, “thread”: {“date”: null, “link_url”: null, “link_metadata”: “”, “closed”: true, “title”: null}}

This looks the same as a bug that was marked fixed in SNAP 2.7.8
Bug Fix – Disqus comments import – missing thread ID.

Has anyone found a fix for this?