VFB not updating on Mac C4D

hey, just started with Corona, coming from Octane. Having an issue with VFB not continuing to render an image. I hit render and it renders to picture viewer but doesn’t continue. Also all of the tool bar button are greyed out. Any thoughts? Using a demo license.

sorry forgot to make sure C4d render setting were set to Corona renderer. Image though is still not refreshing when I change something