We'll create fresh WordPress site with Shared User Table Roles installed. You have 20 minutes to test the plugin after that site we'll be deleted.
When sharing the user and usermeta table between multiple wordpress
installations using the same database, any role given to the user is only valid
for a single wordpress installation.
This plugin ensures user roles, user capabilities and user settings are
shared between the multiple installations. This is configured using a wp-config
constant.
Any role set in any of the installations will be reflected in all other
installations.
Caveats: