Same problem.  It is being caused by the 2023 Lacerte Error \"An Item with the same key has already been added\" When Backing Up Clients to a Flash Drive.  This is an error being caused when backing up a file.  The client is NOT backed up yet it still writes a little something to the flash so reading the flash with explorer you would think the file is there.  When you go and restore this badly backed up file it locks up the program completely and end task/restart is your only option.    

Got the same email today saying next update is March 22, but they are also stating NO ETA for the fix here.  Once got it to work by renumbering the client.  Not the next time.  Also tried changing names by adding temp but didn't work.  Also tried backup to hard drive/desktop folder then copy/paste folder to flash.  Tech support says this has worked for some people, but not for me.  And in case tech support is reading this, fwiw, both clients did work fine until after I did Schedule D imports and now they don't.