One of my members is getting this error and not sure what to do as I’m not getting the error.

Fatal error: Call to undefined function is_user_member_of_blog() in /home/pixelmom/public_html/flingingmud.info/wp-
content/plugins/bp-community-blogs/community_blogs.php on line 104

What do I do about this?

[@djpaul Keymaster 14 years, 5 months ago]

is_user_member_of_blog() is part of WordPress with multisite enabled. The bp-community-blogs plugin appears to require multisite.

To get your site back, rename the /plugins/bp-community-blogs folder to something else and visit yoursite.com/wp-admin/plugins.php.