Hey there,

This change was added to the game a very long time ago in a big patch that revamped the Club system; Adventures. We have some info on the change in our support site here.

If you're back, reach out to the player with President permissions now and see about reclaiming control of the club. If no one is active, the rank should eventually shift back to an active player if the new leader never further adjusted the permissions to prevent that from happening.

The goal of the change was to make sure clubs are kept active by having active leadership. Hopefully you'll be able to reach an agreement with the person who holds the President role now.