I checked all permission in sandbox. but still that error.
May I know what are the other permissions required?
The permissions required for the ECommerce API are documented here - https://docs.clover.com/docs/ecommerce-app-permissions. Your app will need the appropriate permissions for all environments (sandbox/prod). If you recently adjusted your permissions you will need to uninstall, re-install, and then obtain a new access token, please see https://docs.clover.com/docs/401-unauthorized#uninstalling-an-app.
Do I need to request permission for sandbox too?
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