Blender 5.0 no longer allows direct access to fcurves

[jamjallred]

As described in this topic:
https://blenderartists.org/t/how-to-access-fcurves-in-blender-5-0/1623022

The error is thrown after attempting "Bake Into Action"

[guigs4]

https://github.com/guigs4/blender-animation-retargeting/tree/5.0-Fix

The fix was seemingly trivial, at least it worked for me.
Edit: Bulk import is still broken. I'll see what I can do.