Disabling Cognito self-service sign-up. New user account and admins invite page stops working.

[JukkaTim]

I have problem with API Gateway Developer portal I can't understand and make a rollback to previous state.

• I had a Developer portal up an running right.
  -I Disable its self-registration with CLI
  aws cognito-idp update-user-pool --user-pool-id $idPoolId --admin-create-user-config '{"AllowAdminCreateUserOnly": true}'
  -As a developer portal admin I send first invitation to a new user
  -New user can sign-in with account and password provided in email, but published API list is empty ("No APIs published") and she hasn't Dasboard-link
  -At same time admins Admin panel accounts -> Invites page is totally empty
  -In Cognito I can see that a new invited user is not in Developer Portals register Users -group
  -If in Cognito Console this new user is added to Registered users group she can see Published APIs in list but cannot subscribe
  -Returning to state where Cognitos self-servive sign-up is enabled again doesn't help. New (with sign-up function) registered account doesn't go to the registered users -Group.

I have multiple environments in different regions and this is situation in all of them we have tried to use invite-only registration.

At first I need to know how to rollback to state where self-service sign-up works and promotes a new user to Registered user-group. After that we need to find way to switch to invite-only mode user registrations.