Lester Chan on "[Plugin: WP-UserOnline] Only works on multisite main blog"

Hello,

I have installed your plugin on a wordpress multisite. On the main blog it works fine, but in all other blos in the network, no users are listed.

https://wordpress.org/plugins/wp-useronline/

It is mean to list users per blog rather than as a whole network site. If that is what you mean.