I run into this Something went wrong error all the time (video creation) makes it almost impossiable to use firelfy with the pro subscription. Solution?
I have the same issue. I am not using people just an image of a city and it keeps dropping the same meassage. Most of the time I only get the error that something went wrong with no detail.
This error is generated because the Firefly video beta will not generate videos with a reference image that contains children. Whether Firefly video when it leaves beta and enters production still has that restriction, we do not know. But the beta currently has that restriction.
I think this is not generating because of the children issue. I was just able to change aspect ratios back and forth on a test video and it worked on, regardless of the aspect ratio of the keyframe.