Users with Subscriber role in Wordpress cannot see & access CiviCRM
After having tested all the possibilities by checking and unchecking all the options marked in the WordPress Access Control pane, I found that the box "CiviCRM: access CiviCRM backend and API" must be be ticked. Otherwise you dont have access to CiviCRM. Strange because it is told to give this to trusted roles only. The well done documentation is unfortunately lacking on this subject.