This error message can have different causes and we'll need more information to see what's going on.
First, what version of Fusion are you using, what Mac are you running it on, what macOS version are you using, and what operating system are you running in the VM?
Second, can you zip up and post the vmware.log file that's found in the VM's bundle folder. You can find it by locating the VM in the Finder, right clicking on it, then selecting "Show Package Contents". A Finder window will open showing the files that make up your VM. You can find the file there.
- Paul (Technogeezer)
Editor of the Unofficial Fusion Companion Guides