I can't create a custom audience using a list of IDFA file. When I'm upload a plain text (.txt) file that contains the users IDFA appears the error message - 'Failed. Server error. Please try again later'
Everyone is doing so, it is written in the instructions: iAd Workbench: Create and edit audience segments
But I note that for emails list this working properly!
What am I doing wrong for IDFA?
My IDFA file has this format:
ECF0F1EA-BF46-40DC-B98A-18491D37533A
AEA3B781-9814-46DE-A9A2-BDD4557263C8
3C09B242-0B4F-435A-B2CC-88FB3E9B76B2
...