Manage Plugins / Themes page does not lists all the sites

Hello,

This afternoon, I installed MainWP Dashboard on a clean WP installation and MainWP Child on the rest of the WP sites.

The problem is that the Manage Plugins / Themes page is not listing all the websites. By default, when the page loads, it doesn’t show any sites. I then select all the sites in the right column and click Show Plugins / Themes. It then displays only the last site from the select.

I can’t figure out what could be wrong.

As per this (https://kb.mainwp.com/wp-content/uploads/2021/04/manage-plugins.gif) screenshot as seen at Manage Plugins and Themes Table Features - MainWP Documentation, my installation shows only one site.

Anyone knows what could be wrong?