Houdini Publish of usd product : Collect Usd Layers Error

The collect USD layers validators error with a very simple scene with the 0.9.7 houdini and 1.8.4 core addon version.

Traceback (most recent call last):

File "C:\Users\olivier.o\AppData\Local\Ynput\AYON\dependency_packages\ayon_2602231726_windows.zip\dependencies\pyblish\plugin.py", line 528, in __explicit_process

runner(*args)

File "C:\Users\olivier.o\AppData\Local\Ynput\AYON\addons\houdini_0.9.7\ayon_houdini\plugins\publish\collect_usd_layers.py", line 86, in process

child_sublayers = list(layer.subLayerPaths)

^^^^^^^^^^^^^^^^^^^

AttributeError: 'NoneType' object has no attribute 'subLayerPaths'

The same error happen if i use a vanilla houdini reference node to load the .usd asset