I've been successfully running Fusion 8 on my MacBook Air running High Sierra for a few months now. 2 days ago, on start up, a window comes up saying 'internal error' and I can't open my virtual machine. I assumed that maybe my luck had run out running unsupported software on high Sierra so I just paid to upgrade to 10 and tried installing it. It also comes up with 'internal error' during the installation process. I'm at a loss on how to solve this. I saw in another forum post someone talking about an internal error issue and to move the app from the applications folder to another folder then back again, but this didn't yield any results either.