Facebook API exception Empty reply from server.
#0 /var/www/vhosts/rock-fest.com/httpdocs/sites/all/libraries/facebook-php-sdk/src/base_facebook.php(924): BaseFacebook->makeRequest('https://api-rea...', Array)
#1 /var/www/vhosts/rock-fest.com/httpdocs/sites/all/libraries/facebook-php-sdk/src/base_facebook.php(828): BaseFacebook->_oauthRequest('https://api-rea...', Array)
#2 /var/www/vhosts/rock-fest.com/httpdocs/sites/all/libraries/facebook-php-sdk/src/base_facebook.php(663): BaseFacebook->_restserver(Array)
#3 /var/www/vhosts/rock-fest.com/httpdocs/sites/all/modules/fb_events/fb_events.module(116): BaseFacebook->api(Array)
#4 /var/www/vhosts/rock-fest.com/httpdocs/sites/all/modules/fb_events/fb_events.module(61): fb_events_contents(1)
#5 [internal function]: fb_events_block('view', '0')
#6 /var/www/vhosts/rock-fest.com/httpdocs/includes/module.inc(476): call_user_func_array('fb_events_block', Array)
#7 /var/www/vhosts/rock-fest.com/httpdocs/modules/block/block.module(526): module_invoke('fb_events', 'block', 'view', '0')
#8 /var/www/vhosts/rock-fest.com/httpdocs/includes/theme.inc(1654): block_list('right')
#9 [internal function]: theme_blocks('right')
#10 /var/www/vhosts/rock-fest.com/httpdocs/includes/theme.inc(669): call_user_func_array('theme_blocks', Array)
#11 /var/www/vhosts/rock-fest.com/httpdocs/includes/theme.inc(1848): theme('blocks', 'right')
#12 [internal function]: template_preprocess_page(Array, 'page')
#13 /var/www/vhosts/rock-fest.com/httpdocs/includes/theme.inc(710): call_user_func_array('template_prepro...', Array)
#14 /var/www/vhosts/rock-fest.com/httpdocs/index.php(35): theme('page', '