Available Widgets Do Not Display When Advanced Post List Plugin Active

When viewing appearance->widgets from the Worpress dashboard, nothing is displayed if I have the Advanced Post List plugin activated. Deactivating it corrects the problem. I have Version 0.5.6.2 of the plugin. Please advise.

WordPress 6.6.1 running PHP version: 8.1.28.

The page I need help with: [log in to see the link]