First, ensure that the subscription app catalog is enabled:
- Click your profile picture dropdown in the upper right corner
- Click System Administration
- Click Subscription in the top menu
- Look for "Allow community app catalog apps"
If it is set to false:
- Click the Actions dropdown at the upper right of the page
- Click Edit Subscription
- Place a checkmark next to "Allow community app catalog apps"
- Click "Save & Close"
To add an app to the subscription app catalog
- While on the subscription configuration page, click the Apps link in the left pane
- Click the "+ Add New" button
- Click the "Add with Details" button
- Enter a Name
- Paste your source code into the Source field
- Click "Save & Close"