=== HTTP code : 200 ===

Response headers
================
HTTP/1.1 200 OK
X-Frame-Options: DENY
X-XSS-Protection: 0
Cache-Control: private, no-cache, no-store, must-revalidate
Access-Control-Allow-Origin: https://www.facebook.com
Access-Control-Expose-Headers: X-FB-Debug, X-Loader-Length
Pragma: no-cache
Vary: Origin
X-UA-Compatible: IE=edge,chrome=1
Strict-Transport-Security: max-age=15552000; preload
Access-Control-Allow-Credentials: true
P3P: CP=&quot;Facebook has no P3P policy fb.me/p3p&quot;
Access-Control-Allow-Methods: OPTIONS
Content-Type: text/html;charset=utf-8
X-Content-Type-Options: nosniff
Expires: Sat, 01 Jan 2000 00:00:00 GMT
Set-Cookie: fr=1CY2wOLdyIeCW4XqH..BbqIml.vE.AAA.0.0.BbqIml.AWVd0LJY; expires=Sun, 23-Dec-2018 06:52:21 GMT; Max-Age=7776000; path=/; domain=.facebook.com; secure; httponly
Vary: Accept-Encoding
X-FB-Debug: Vpz/a5AFr35XwBQBhrbm+J9srBZrNpISIDAN8j7fyqFd+f62JXacWIicxTWGmKERcBtd+ro6EciUcgMSb36Q9A==
Date: Mon, 24 Sep 2018 06:52:21 GMT
Transfer-Encoding: chunked
Connection: close

Request headers
================
HEAD /groups/128381951198186/ HTTP/1.1
User-Agent: Mozilla/5.0 (compatible; MSIE 9.0; Windows NT 6.1; WOW64; Trident/5.0)
Host: www.facebook.com
Accept: */*
Referer: http://sothisisfitness.com
Connection: close


Link is valid.