The plugin does require PhysX to be used by the engine (for now, I’m getting rid of this requirement soon) so this masyu be the issue you are seeing. Does your project target a platform which does not support PhysX?
UE4 traces do not work because the soft-bodies are not part of UE’s physics system, but you can either use the two queries that come with the plugin or attach hidden trace colliders to the soft-body for use with UE’s traces. I can go into more detail if you’d like