Facebook needs the CURL PHP extension. on line 19 in /home/nginx/html/forum/includes/facebook/base_facebook.php
#0 /home/nginx/html/forum/includes/facebook/facebook.php(18): require_once()
#1 /home/nginx/html/forum/includes/class_facebook.php(13): require_once('/home/nginx/htm...')
#2 /home/nginx/html/forum/includes/functions.php(8079): require_once('/home/nginx/htm...')
#3 /home/nginx/html/forum/includes/class_bootstrap.php(223): is_facebookenabled()
#4 /home/nginx/html/forum/includes/class_bootstrap.php(85): vB_Bootstrap->load_facebook()
#5 /home/nginx/html/forum/global.php(26): vB_Bootstrap->bootstrap()
#6 /home/nginx/html/forum/forum.php(67): require_once('/home/nginx/htm...')
#7 /home/nginx/html/forum/index.php(43): require('/home/nginx/htm...')
#8 {main}