We’ve created a sandbox developer account as mentioned here (https://developers.asana.com/docs/developer-sandbox). The reason for creating this sandbox account (instead of our free user account) is for integrating the API of Asana. Recently Asana decided to make custom fields for tasks a premium feature and we thought that creating a developer sandbox will give us access to this premium feature. As the above link states:
An Asana developer sandbox consists of a temporary Asana domain with limited users. It is essentially a standard Asana account where you can test premium features during development.
During the setup of this sandbox account we also had to select the features required:
Despite selecting the premium level that allows custom fields. I am still not able to use these custom fields on this sandbox account.
Are there any other other actions that need to be fulfilled?