I'm having problems getting a user account access to my model-driven app. I'm trying to create a role with the minimum set of privileges to be able to use the app.
1) I created 2 roles, one with the minimum set of privileges Create or edit a security role - Power Platform | Microsoft Docs
and the other role with read/write access to some custom entities plus Model-driven app Read privileges have been granted.
2) I granted the user these 2 roles
3) I added these 2 roles to the App
When I log in with the user credentials I only get the message "We can’t find any apps for your role".
If I copy the URL of an entity list [e.g. Active Accounts view] from another user account, into the browser of the new account, I can access the entity list. However, the left-hand menu is not displayed. Somehow only parts of the App are accessible rather than the entire App.

If I grant the user the System Customizer role and add this to the app, the user has access to the complete app. This indicates that the user has the proper license for the app.
Somehow there are permissions missing in the MS minimum permissions role and my new role, to be able to access the complete app.
Any thoughts?