Figma Make prototype has stopped working, and previous versions cannot be restored

Hi, I’m having an issue with one of my Figma Make prototypes; “DL Prototype (BA Copy)”. When I try and restore any previous version (using the Version history dropdown, as shown in the message above), Make says it can’t fetch it. We’ve also tried prompting Make to undo changes and revert to an earlier version with no success. There is no preview and it appears as though all / key files have been deleted somehow.