Hopefully this is the right section.
I recently updated to DAZ Studio 4.20 and am using the plugin version 2020.1.5.55 Enterprise plugin.
Whenever I load any scene that has Octane materials saved with them, when loading them after I updated DAZ (I had to because it wasn't working anything correctly after upgrading to Windows 11) all materials are gone, everything in the scene itself shows up blue (so there's no material associated with it as they're all gone from the materials list in the plugin.
Details:
OS: Windows 11 21H2 (22000.527)
DAZ version: 4.20.0.2
OctaneRender Plugin version: 2020.1.5.55