[Plugin: Category Meta plugin] WordPress Version 3.1.3 Multisite

Same here :/

This happens because the table that the plugin uses is created on plugin activation, and the plugin activation method is not multisite aware. The formal way of addressing this would be by following the structure found here – https://www.ads-software.com/extend/plugins/proper-network-activation/

We are actually using this as a must-use plugin, which never runs an activation hook, so we handled it a bit differently. The solution we used involves fewer lines of code and will work whether you are running it as a must use or just using network activate. The only tradeoff is one extra query every time you load wp-admin.

Add the following between lines 163 and 164 of wp-category-meta.php:

global $wptm_table_name;
global $wpdb;
if(is_admin() and $wpdb->get_var(“show tables like ‘$wptm_table_name'”) != $wptm_table_name) {
wptm_createTable($wpdb, $wptm_table_name);
}

What this does now is every time you load wp-admin, the plugin will check to ensure that a table exists for the current network site, and if it does not, it will create it.

Works like a charm.