As of 23rd June, we encounter issue in uploading any playables to facebook campaigns. This includes playables from playablemaker but also from other vendors whom we are in contact with. Even though alll builds are according to expected output, facebook upload validation fails.
You can upvote the bug report on facebook here: https://developers.facebook.com/community/threads/24430142593237351/?post_id=24430142606570683
Workaround exist: Using Moloco builds instead
