In order to enable the app for buisness users, you typically need to make sure the following permission requirements are met:
- Read or higher permission level on site collection "/sites/contenttypehub"
- Read or higher permission level on App Catalog, to identfiy the URL of your App Catalog, use these steps:
- Open the App Catalog in you SharePoint environment. If you don't know the URL, follow these steps:
- Open SharePoint Central Administration
- Navigate to Apps (left hand navigation)
- Choose App Catalog
- Make sure you've selected the correct Web Application and open the App Catalog