Warning: Invalid argument (M)Social @ jreviews

Hi there,
I get these massage in jreviews

Warning: Invalid argument supplied for foreach() in /home/.sites/472/site272/web/templates/gk_msocial/html/com_content/article/default.php on line 13

default.php:
13 foreach($attribs as $key => $value) {
14 if($value != null) {
15 $params->set($key, $value);
16 }
17 }

Does anybody know the problem??
Thanks for help!!

Please check if changing filename:
templates/gk_msocial/html/com_content/article/default.php
to
templates/gk_msocial/html/com_content/article/_default.php
removes the error?