Follow these steps to connect Dropbox via the StackOne Hub successfully.
Log in to Dropbox Developers
Create a New App
Copy App Key and App Secret
Enter Redirect URI
https://api.stackone.com/connect/oauth2/dropbox_iam/callback
Set Permissions
account_info.read
team_info.read
team_data.member
members.read
, groups.read
Save Changes
Enter Credentials
Connect
Connect
button.