+1 to @mois.moshev, this is the error coming from Houdini and the actual error from Houdini is ignored as it is formatted to show the generic error first. Here is more information on this: Errors running houdini on worker: ERROR: Encountered the following error while initializing the Plugin Sandbox: 'Value cannot be null. (Parameter 'input')' - #3 by Justin_B
We should isolate the Houdini render from Deadline and try run this render node it failed. Follow this documentation to isolate: Houdini — Deadline 10.3.2.1 documentation