If I start Houdini via SessionSync, everything works as expected - I get a HoudiniEngine session and the sample Curve node works - I can draw curves in the Unity viewport.

However, if I try HE - Create Session - Pipe or Socket - I get these errors and, even though I can create a sample Curve node - I don't get the expected Unity viewport ability of drawing curves.

Houdini Engine: Created Pipe session with ID 11449483072.
UnityEngine.Debug:LogFormat (string,object)
HoudiniEngineUnity.HEU_Logger:LogFormat (string,object) (at Assets/Plugins/HoudiniEngineUnity/Scripts/Utility/HEU_Logger.cs:45)
HoudiniEngineUnity.HEU_SessionHAPI:InternalCreateThriftPipeSession (bool,string,bool,single,bool,bool,bool) (at Assets/Plugins/HoudiniEngineUnity/Scripts/Sessions/HEU_SessionHAPI.cs:452)
HoudiniEngineUnity.HEU_SessionHAPI:CreateThriftPipeSession (bool,string,bool,single,bool) (at Assets/Plugins/HoudiniEngineUnity/Scripts/Sessions/HEU_SessionHAPI.cs:347)
HoudiniEngineUnity.HEU_SessionManager:CreateThriftPipeSession (string,bool,single,bool) (at Assets/Plugins/HoudiniEngineUnity/Scripts/Sessions/HEU_SessionManager.cs:321)
HoudiniEngineUnity.HEU_EditorMenu:CreatePipeSession () (at Assets/Plugins/HoudiniEngineUnity/Editor/HEU_EditorMenu.cs:59)

Set Server Environment : Failed to get status string. Likely the session is invalid.
If session is invalid, try restarting Unity.
UnityEngine.Debug:LogError (object)
HoudiniEngineUnity.HEU_Logger:LogError (string) (at Assets/Plugins/HoudiniEngineUnity/Scripts/Utility/HEU_Logger.cs:62)
HoudiniEngineUnity.HEU_SessionBase:SetSessionErrorMsg (string,bool) (at Assets/Plugins/HoudiniEngineUnity/Scripts/Sessions/HEU_SessionBase.cs:192)
HoudiniEngineUnity.HEU_SessionHAPI:HandleStatusResult (HoudiniEngineUnity.HAPI_Result,string,bool,bool) (at Assets/Plugins/HoudiniEngineUnity/Scripts/Sessions/HEU_SessionHAPI.cs:789)
HoudiniEngineUnity.HEU_SessionHAPI:SetServerEnvString (string,string) (at Assets/Plugins/HoudiniEngineUnity/Scripts/Sessions/HEU_SessionHAPI.cs:846)
HoudiniEngineUnity.HEU_SessionHAPI:InitializeSession (HoudiniEngineUnity.HEU_SessionData) (at Assets/Plugins/HoudiniEngineUnity/Scripts/Sessions/HEU_SessionHAPI.cs:759)
HoudiniEngineUnity.HEU_SessionHAPI:InternalCreateThriftPipeSession (bool,string,bool,single,bool,bool,bool) (at Assets/Plugins/HoudiniEngineUnity/Scripts/Sessions/HEU_SessionHAPI.cs:463)
HoudiniEngineUnity.HEU_SessionHAPI:CreateThriftPipeSession (bool,string,bool,single,bool) (at Assets/Plugins/HoudiniEngineUnity/Scripts/Sessions/HEU_SessionHAPI.cs:347)
HoudiniEngineUnity.HEU_SessionManager:CreateThriftPipeSession (string,bool,single,bool) (at Assets/Plugins/HoudiniEngineUnity/Scripts/Sessions/HEU_SessionManager.cs:321)
HoudiniEngineUnity.HEU_EditorMenu:CreatePipeSession () (at Assets/Plugins/HoudiniEngineUnity/Editor/HEU_EditorMenu.cs:59)

HEU_HoudiniEngineError: Exception of type 'HoudiniEngineUnity.HEU_HoudiniEngineError' was thrown.
HoudiniEngineUnity.HEU_SessionHAPI.HandleStatusResult (HoudiniEngineUnity.HAPI_Result result, System.String prependMsg, System.Boolean bThrowError, System.Boolean bLogError) (at Assets/Plugins/HoudiniEngineUnity/Scripts/Sessions/HEU_SessionHAPI.cs:808)
HoudiniEngineUnity.HEU_SessionHAPI.SetServerEnvString (System.String name, System.String value) (at Assets/Plugins/HoudiniEngineUnity/Scripts/Sessions/HEU_SessionHAPI.cs:846)
HoudiniEngineUnity.HEU_SessionHAPI.InitializeSession (HoudiniEngineUnity.HEU_SessionData sessionData) (at Assets/Plugins/HoudiniEngineUnity/Scripts/Sessions/HEU_SessionHAPI.cs:759)
HoudiniEngineUnity.HEU_SessionHAPI.InternalCreateThriftPipeSession (System.Boolean bCreateSession, System.String pipeName, System.Boolean autoClose, System.Single timeout, System.Boolean bIsDefaultSession, System.Boolean logError, System.Boolean autoInitialize) (at Assets/Plugins/HoudiniEngineUnity/Scripts/Sessions/HEU_SessionHAPI.cs:463)
HoudiniEngineUnity.HEU_SessionHAPI.CreateThriftPipeSession (System.Boolean bIsDefaultSession, System.String pipeName, System.Boolean autoClose, System.Single timeout, System.Boolean logError) (at Assets/Plugins/HoudiniEngineUnity/Scripts/Sessions/HEU_SessionHAPI.cs:359)
HoudiniEngineUnity.HEU_SessionManager.CreateThriftPipeSession (System.String pipeName, System.Boolean autoClose, System.Single timeout, System.Boolean logError) (at Assets/Plugins/HoudiniEngineUnity/Scripts/Sessions/HEU_SessionManager.cs:321)
HoudiniEngineUnity.HEU_EditorMenu.CreatePipeSession () (at Assets/Plugins/HoudiniEngineUnity/Editor/HEU_EditorMenu.cs:59)

MacOS Ventura 13.4
Houdini 19.5.640 Silicon
Unity Silicon 2022.3.2.f1 with URP Template
HE plugin 19.5.640

Submitted bug report: https://www.sidefx.com/bugs/#/bug/129761 [www.sidefx.com]