Error - os image was not created

I’m running MDS Version 3.0 (30108) on MacOS 10.15.5 on a MacBook Air (Retina, 13-inch, 2018) . When trying to download any version of MacOS within MDS to a folder on the desktop I get the following error.

The OS Image was not created successfully. Please grant /Library/PrivilegedHelperTools/com.twocanoes.mdshelpertool Full Disk access in System Preferences->Privacy->Full Disk Access and reboot. This is required so MDS can access removable volumes.

I’ve followed the instructions and also added MDS to full disk access but it still only download .sparseimages of the os with a content folder containing several GB in there downloads folder.

We are tracking this issue. In the meantime, please download to a folder in /Users/Shared. It isn’t protected by TCC and you won’t have that error.