Microsoft Edge Legacy Virtual Machine doesn't start in VMWare Fusion 12 Pro
It appears the VMWare Fusion .dmg installation image file was put under the MacOS Quarantine, which made the application not function properly.
Uninstalling VMWare Fusion (I removed all files with AppCleaner), downloading the .dmg file again, and then running the following commands on the file, followed by running the installer solved the issue for me:
xattr -l ~/Downloads/VMware-Fusion-12.1.0-17195230.dmg
xattr -dr ~/Downloads/VMware-Fusion-12.1.0-17195230.dmg