This is the error: Fatal error: Call to undefined function is_multisite() in /home/davedman/public_html/wp-content/plugins/marketpress/marketpress.php on line 268
I have wordpress set up as a multi-site and have one site.
I'm a newbie to wpmu and fairly new to WP, but I've been on the internet as a generalist (programming, linux, Cpanel, html, graphics) know a lot about a lot, just not an expert in too much.
Didn't want to start changing code--I'm a jr. php coder.
Any help you can give me would be great.