After migrating to ojs 3, new users with reader permission are not able to read articles

After migrating to OJS3 the new users created with reader permission only are not able to access restricted or embarged articles with . Old user with the same permission, that were in the database before migrations, works fine and are able to read the embarged articles.
In the database, this new user are not added to the subscriptions table.
Do OJS3 needs an specific plugin or module to manage subscriptions?
Any clue? Thanks