If I understand you correctly, are you are trying to use Fusion 8.5.10 on Mojave? If so that's not supported and won't work. You will need Fusion 11 for use on Mojave.
See the VMware KB article Supported host operating systems for VMware Fusion and VMware Fusion Pro (2088571) for the supported Fusion and macOS version matrix.
- Paul (Technogeezer)
Editor of the Unofficial Fusion Companion Guides
