steps
# open project
# ensure "New Shader Graph" is open
# ensure a URP asset is assigned to Project Settings > Graphics
# ensure active URP asset is using Lighting > Light Probe System  = Probe Volumes
# In project tab, click "New Shader Graph.shadergraph" then check inspector tab
# check console

Expected: no errors in inspector tab or in console

Actual: errors in inspector tab, also shown in console sometimes

Repro: Unity 2023.1.2f1, 2023.2.0a22

No Repro: Unity 2023.1.1f1

Notes: 
* Workaround - Set Light Probe System = "Light Probe Groups" on the active URP asset AND then click "save asset" in the affected shader graph(s)
* the shader compilation error can be cleared from console BUT MAY STILL BE PRESENT - follow step 5 - click the shader graph asset in project tab, and check inspector tab to see the error in inspector, and also to get the error in console again