jom social theme causing error

i installed the jomsocial theme that came with the template and it causes this main error on the site

Fatal error: Call to undefined method CConfig::getBool() in /home/dance/public_html/components/com_community/templates/gk_style/activities.index.php on line 89

can you advise?

did you tried to check uploaded JomSocial files ? Because in templates for Jomsocial we haven't edit PHP code - only XHTML structure.