For this App, the first time that I uploaded the binary the 'External' column correctly presented the action 'Submit for Beta App Review'...
After clicking on it, the App got successfully reviewed...
After that, I sent another binary for a new version and now the column 'External' remains Inactive...
PS.: I have added external users(the status remains 'Added') and I have also filled in all information in 'Build Details'. Other Apps in my account are working correctly, only this one has this issue.
How do I fix this? Is it a known issue in iTunes Beta Testing?
Any help or guidance is really appreciated... Thank you for your help in advance.
Apple have fixed the issue, my 1.1 version had the same issue but the submit for review button is now available again.