I created an .ORBX material in maya 2019 (in the 2019 plugin) and I get the following error:
connectAttr -f Medium_Basalt.outColor Medium_BasaltSG.surfaceShader;
// Connected Medium_Basalt.outColor to Medium_BasaltSG.surfaceShader. //
// Error: Octane LiveDB: error creating Octane-DB node //
// Error: file: C:/Program Files/Autodesk/Maya2020/scripts/others/propertyPanel.mel line 829: No object matches name: Vertex_displacement_mixer //
I attempted this on a brand new, empty, scene as well as my scene originally created in 2019
It works fine to manually import that material via .ORBX material node but not via LocalDB.