Forbidden on importing existing tables

[sgiovinetti]

Environment: Azure webapp taken directly from public docker container (latest directus version)
DB: Azure SQL Database

Issue: from the directus app, I can create the collection without any problem but as soon as I create a table in the DB with SQL Management Studio the table is shown in the settings --> data model but there is no fields available and whatever you do like adding fields or just viewing the collection in the Content page I receive the error {
"errors": [
{
"message": "You don't have permission to access this.",
"extensions": {
"code": "FORBIDDEN"
}
}
]
}

Thank you in advance for your support.