Hi, we are facing the same issue, with the same email response:
ITMS-90338: Non-public API usage - The app references non-public symbols in Frameworks/AmazonIVSPlayer.framework/AmazonIVSPlayer: _CMTimebaseCreateWithMasterClock. ...
Builds from yesterday passed submission, but not today. AmazonIVSPlayer.framework is the same in both cases.
many reports here
Yoo_Stas
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