I have now rolled-back to a previous image of the VM that I run
ForticlientEMS on and when I attempt to create an installer package for
7.4.1 (which was successfully created last month) it fails with the
error mentioned in the original post.
It seems to me that after the above error occurs you cannot create any
installers even ones that had been previously created. I have tired
rebooting the ForticlientEMS server, made sure the version is current,
deleted all Forticlient installers.