Unable to assign Groups using pilot about fastlane HOT 3 OPEN

I am facing the same issue. Can anyone provide some help?

from fastlane.

I'm getting the same issue too, except that the build in question was actually published to both internal and external testers successfully according to App Store Connect. So it appears to be a spurious error message.

from fastlane.

Hello,
It seems like you’re encountering an issue with assigning TestFlight groups using Fastlane’s pilot. Let’s troubleshoot this together.

Check Default External Group:
By default, if you don’t specify a group, the app will be published to the “External Testers” group.
Make sure you have a default external group set up in your TestFlight destinations.
If you want to publish to other groups, try specifying them using the PILOT_GROUPS environment variable. For example:
PILOT_GROUPS='Group 1','Group 2','Group 3'
Note that you can also pass the groups directly into your testflight call using the groups: argument and a Ruby array.
Code Signing:
Ensure that your code signing is set up correctly. Sometimes issues with code signing can affect TestFlight distribution.
You might find the Code Signing Troubleshooting Guide helpful.
Manual Publish from App Center:
If you’re using the App Center plugin, try manually publishing to the desired group from the App Center website first.
Once you do that, the group should be added as a valid destination for the appcenter_upload Fastlane action.
Give these steps a try, and let me know how it goes! If you encounter any further issues, feel free to ask.
mycenturahealth

Best Regards

from fastlane.