SwiftUI Catalyst MacOS App cannot be opened by Testers

I have an iOS App that I have converted with Catalyst to a MacOS App. I created an archive, validated it and posted it on App Store Connect. In Organizer I selected Distribute App, then chose Developer ID, then exported the notorized app. I sent the .app file to a user who is in my tester group on app store connect but they are not able to open the app.

I did add the iMac of the user to my devices on App Store Connect.

This is the error: You do not have permission to open the app "appname"

I thought that might be a local issue, so I looked at the file permissions and they do indeed say read,write permission.

I hope I'm missing something simple here. Any guidance would be appreciated. Xcode 12.4, iOS 14.2, macOS Big Sur 11.2
SwiftUI Catalyst MacOS App cannot be opened by Testers
 
 
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