The issue you described should be resolved now. Please upload another build in order to start testing again. If it is not, and you seeing the same error, please may I ask you to create a bug that can be assigned to the correct team? If you have any questions about filing a bug report, take a look at Bug Reporting: How and Why? Albert Pascual
Worldwide Developer Relations.
Topic:
App Store Distribution & Marketing
SubTopic:
TestFlight
Tags: