Forget Me Not

I’m losing my marbles on this one. I’ve tried the tool on a number of platforms (due to errors) and finally got it running on a fresh Kali VM, using a fork that supposedly addresses the issues I was running into with the stock version. I’m able to extract most of the filesystem, though many (not all) files I’m curious about appear to be zero filled. I’ve also used a separate tool for file carving to see if I missed anything. Still no luck. Anyone willing to lend a nudge?