I use several VMs and have been using VMWare Fusion for years. No problems.
Then last month one of my two main vms got this strange error. I futzed with it but was in a hurry and ended up being able to copy the critical files off of it just in case and the darn thing is still corrupted somehow and I really cannot use it any more.
So…this past weekend I received a similar error that looks somethings like this…
…except that this time it was on my really, really main VM so I quickly used The Google and found this …
…used it…
…and my really, really main VM was fixed.
Best of luck!