Ram Almog was getting a MISSING_SCOPES error for `transactional-email` when calling the transactional email send API (`/marketing/v3/transactional/single-email/send`) despite the private app having that scope.

The user discovered they were using the wrong endpoint. They likely needed the standard Marketing Single Send API (`/marketing/v4/email/single-send`) which requires the `marketing-email` scope, rather than the Transactional Email API which requires a specific paid add-on in addition to the `transactional-email` scope.