Getting fatal errors "Error Domain=rive.app.ios.runtime Code=600"

Rive: v0.8.1780 browser and app
OS: macOS 14.6.1 (23G93)

Hi everyone 👋

First time Rive-user here. My team and I are getting this error constantly from Xcode:

Thread 1: Fatal error: 'try!' expression unexpectedly raised an error: Error Domain=rive.app.ios.runtime Code=600 "Malformed Rive File." UserInfo={name=Malformed, NSLocalizedDescription=Malformed Rive File.}

My file is super simple. One timeline with small opacity-transitions. I have even done a stripped-down version with no anim, and still we get the same error.

I've made a small bounce-scale-effect that I placed into a separate Artboard. Is this a no-no?

All my layers have unique names.

Any heeeelp please!

Best, Henriko