I have recently installed the NMD sandbox (all four of them) by DnA off of the steam workshop. I was then able to transfer it into the eden editor to place a bunch of enemies. Both in the vanilla and my custom version of the Scenario I can't save any of my progress in it. I have enabled "multiple saves" in the difficulty settings and enabled "Saving" in the Game settings. But the Save button is still greyed out. I do not have this issue on most of my other downloaded scenarios. I have also looked through the mission files of it to see if there was a disable saves command that was blocking me but I found nothing.