App closes down when uploading an image from iOS phone's Gallery

I installed the IPA of an Ionic app on an iPhone with iOS 10.1.1

Using the FileDB__files_upload_service from the plugin, whenever we try to upload an image from the phone's Gallery, the app will crash and close, logging the user out.

I have also tested on iOS 9.4.1 and iOS 12.2 withou this issue.

What could be causing this? The app is using Cordova iOS 4.5.1.

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