Custom Sheet Sandbox JSON not found problem

hello forum, i have tried to use the sandbox to do adjustments to a JSON file but the page keeps telling me that the "JSON not found"

i copied / pasted a generic JSON example from the wiki to see if it was my JSON or the sandbox, and it still says JSON not found

this is the generic example:

{
  "html": "kitchensink.html",
  "css": "kitchensink.css",
  "authors": "Roll20 Team (@roll20app)",
  "roll20userid": "1",
  "preview": "kitchensink.png",
  "instructions": "**This is a test**\n\nYou can put Markdown-formatted instructions here for how to use your sheet. Please try to keep it moderately-short (500 characters or less is preferred).",
  "legacy": true
}

im i doing something wrong? funny enough i remember, this used to work last month, when i tried the sandbox for the first time

I noticed the same thing.  The sheet settings/options seem to work, but no image or preview and you always get that "JSON not found" error. ;-(

this is unfortunately still an issue

I'm seeing the same issue. I started a thread over here before i knew about this report.