How do I fix the “sorry, you are not allowed to access this page” error I get on the “plugins > settings” links?

I just upgraded to WordPress 4.6, and now when I try to click on the Settings link on some of my plugins I get this “Sorry, you are not allowed to access this page.” message.

I can active/deactivate the plugin fine but for some reason I can’t go under the settings view.

I tried following some of the methods that other people used to fix this; like adding a new administrator and updating the “wp_capabilities” and “wp_user_level” values in the DB but it still does not work.

Does anyone know how I can further debug or resolve this issue?

I discover this message “Sorry, you are not allowed to access this page” mostly occur when various WordPress sites are in the same phpMyAdmin – all bearing the same table prefix, irrespective of the database name. I can’t tell how many WordPress sites are expected to be in the same phpMyAdmin with the same table prefix.