Blank page on view publications

In error log:

[Sat May 06 13:24:20 2017] [error] [client 77.51.76.215] PHP Warning: SimpleXMLElement::__construct(): Entity: line 1: parser error : Start tag expected, '<' not found in /usr/raid/www/data/rc-fun.elgg/template/scripts/BxBaseMenuSocialSharing.php on line 92, referer: http://elgg.rc-fun.ru/page/posts-author?profile_id=2
[Sat May 06 13:24:20 2017] [error] [client 77.51.76.215] PHP Warning: SimpleXMLElement::__construct(): Not Found <br /><a href="http://www.facebook.com/">Back to Facebook.</a> in /usr/raid/www/data/rc-fun.elgg/template/scripts/BxBaseMenuSocialSharing.php on line 92, referer: http://elgg.rc-fun.ru/page/posts-author?profile_id=2
[Sat May 06 13:24:20 2017] [error] [client 77.51.76.215] PHP Warning: SimpleXMLElement::__construct(): ^ in /usr/raid/www/data/rc-fun.elgg/template/scripts/BxBaseMenuSocialSharing.php on line 92, referer: http://elgg.rc-fun.ru/page/posts-author?profile_id=2

But a few days ago everything worked