3Delight Houdini Operation Failed can't create ROP

[jeantest]

Hello,

I downloaded 3Delight for houdini 18.5.499 and even tho I tried with different versions of 3Delight when I try to create a Rop this message appears.

Does anyone have an idea to solve it? Thanks!

Traceback (most recent call last):
  File "_3dl_rop_3Delight", line 4, in <module>
  File "C:/PROGRA~1/SIDEEF~1/HOUDIN~1.499/houdini/python2.7libs\roptoolutils.py", line 10, in createRenderNode
    rop = hou.node('/out').createNode(rop_type, exact_type_name=exact_type_name)
  File "C:/PROGRA~1/SIDEEF~1/HOUDIN~1.499/houdini/python2.7libs\houpythonportion\ui.py", line 1081, in decorator
    return func(*args, **kwargs)
  File "C:/PROGRA~1/SIDEEF~1/HOUDIN~1.499/houdini/python2.7libs\hou.py", line 13130, in createNode
    return _hou.Node_createNode(self, node_type_name, node_name, run_init_scripts, load_contents, exact_type_name, force_valid_node_name)
OperationFailed: The attempted operation failed.
Invalid node type name