My app stops at 90% on testfight and doesn't download

I am creating an imessage sticker pack and I am having an issue with an update of my app. It publishes to test flight but I can't download it to test. My app has an extension of imessage.

I have tried:

  1. Checking the size of the animated stickers. All are below 500kb
  2. My version number is 4.1.1. so no 0

I am really no sure what to do. Any suggestions would be appreciated.

My app stops at 90% on testfight and doesn't download
 
 
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