I'm getting an error when I try to network activate the plugin (can't find the plugin if I should try to just activate it just for the site in question) :
The plugin paid-memberships-pro/paid-memberships-pro.php has been deactivated due to an error: Plugin file does not exist.
I've installed through WP and manually (FTP) same problem.
Running : WordPress 3.5.1. (WP Multisite)