Description

The current implementation of API doesn't return detailed error when a font upload fails. Because of this reason, it is not possible to show appropriate error message in the UI.

Return detailed error messages from the API.

Step-by-step reproduction instructions

Try uploading a .otf file, and observe that API doesn't return any relevant error message or type.

Screenshots, screen recording, code snippet

No response

Environment info

• Gutenberg trunk

Please confirm that you have searched existing issues in the repo.

Yes

Please confirm that you have tested with all plugins deactivated except Gutenberg.

Yes