I have tried importing this otl file (in this tutorial https://www.sidefx.com/products/houdini-engine/ue4-plug-in/ [sidefx.com]
free asset HauntedStairCase downloded from orbolt) but the asset doesn't show up in the engine folder view.

Is this error caused by my license issue? But this otl file wasn`t created from my apprentice license.

Is this a known issue with a possible solution?

houdini version 16.0.504.20
houdini engine for UE version 4.14
unreal engine version 4.15 or 4.14.3 (tried both)

Thank you for trying to understand my poor English.