My problem is resolved, thanks for answering

There's an issue that with the latest version of the blender plugin which would not activate unless there's an already existing session on your machine.

Until a new version gets released which this fix which will happen soon, you need to authenticate either using an older version or Octane ...

J.C wrote:Have you upgraded to v4 on Otoy's website?

I have tried 2018.1 - 17.0 and 4.01.1 - 16.3.1 none of which worked for OctaneServer. Blender works just fine.

Hello, I installed latest Octane for Blender and Octane server but whenever I launch OctaneServer it returns- Error activate Octane Engine: Could not activate. OctaneRender Studio works fine. I reinstalled it several times, tried different versions but no luck. Is there any way to make it work ...