I'm trying to create a VM with macOS 12.6.1 under Fusion 13. I downloaded the "Install macOS Monterey" application, drag it into the new-VM dialog, tell it that it's macOS 12, save the machine, ... and then I get the dreaded "Unable to create the installation medium" message.

None of the suggested fixes for the same problem in previous versions of Fusion seem to work for me. In particular, I tried moving the installer out of the Applications folder onto my desktop, and I verified that the installation disk image was not already mounted.

Does anyone have any other suggestions?