Has anyone received this message in Blender 3.0 when trying to render with ProRender in the viewport or Rendering tab? ProRender still works completely fine in Blender 2.93. I’m using version 3.3.0 of ProRender. Nothing seems to render at all in Blender 3.0 with ProRender. I'm using macOS 12.0.1.
Currently Pro Render works in Blender versions up to 2.93.x
Work is underway to make it work in Blender 3.0.x and you can download a pre-release version from the Pro Render Weeklies page, link below. As it is a pre-release version it may be unstable, but if you don't mind helping the developers you can download it and report any bugs through the usual process.
I have found that RPR works perfectly with 3.0 as long as you're using an RDNA2 GPU. Using the Ampere GPU on my work computer, I had to roll back to Blender 2.8 because of the need for OpenCL.