Hello
Find and open file plugins/systems/jo_zoo_socialshare/jo_zoo_socialshare.php Go to line 310 and changed
$setbody = preg_replace("/<div class=\"floatbox\">/", "<div class=\"floatbox\">"."\n\n".$socialshare, $body);
To
preg_match_all ("/<h1 class=\"uk-article-title\">([^`]*?)<\/h1>/", $body, $matches);
$setbody = preg_replace("/<h1 class=\"uk-article-title\">([^`]*?)<\/h1>/", "<h1 class=\"uk-article-title\">".@$matches[1][0]."</h1>\n\n".$socialshare, $body);
Or you can send me joomla administrator via contact form? So we can help you
Best regards
Bach Pham