Minyan Cai

Removing the "Houdini Engine with UE4" license from the license administrator and restarting everything resolved the issue for me.
Before the Houdini engine UE4 plugin loaded a "Houdini Engine" license (which is of the commercial scope). I think that's from a previous installation or something that makes the plugin confused.
You want the plugin setting in UE4 to recognize a "Houdini Engine Indie" license if your asset is of the limited commercial scope

assignators
You need to download plugin source files, and add flags in there to open session sync with Indie mode specifically.

But its not advice to mix indie/commercial in same pipeline, do not do it

I'm running into the same issue with using an indie license with Houdini engine for UE4.
Can you provide more specific instructions on how to start session sync with Indie mode?
Does that involve recompiling the plugin or UE4? Or is it configurational
Thank you