Query Dropbox API

First, note that you don't need to use the request_json_object method directly. You should use the provided native methods for the API endpoints, such as files_list_folder for /2/files/list_folder.

Anyway, this error message is referring to specifying what account on the Business team to operate on behalf of. When using any "team scopes", the resulting access token is connected to an entire Dropbox Business team, not an individual account. So, when using a team-scoped access token to access user-specific endpoints, such as /2/files/list_folder via the files_list_folder method in the Python SDK, you will need to specify which member of the team you want to operate on behalf of. 

To do this, you'd need to specify the 'Dropbox-API-Select-User' header. The value should be the team_member_id for whichever member you wish to act on behalf of. In the Python SDK, that can be done using the DropboxTeam.as_user method.

Alternatively, if you just want to connect to your particular account, you can disable any team scopes and get a new access token without them. The access token without the team scopes will be specific to the particular account (Business or not) and so will not require the additional header. You can find more information on scopes in the OAuth Guide. If you don't need to call any team endpoints (e.g., if you just need to call file endpoints, such as /2/files/list_folder via the files_list_folder method), you may prefer to use this solution instead for simplicity and security.