The fix for this is to add
"spoiling_required": true,
to info.json. Without this, the mod WILL fail to load on a base no space age game, unless some other mod happens to have enabled the "spoiling_required" feature flag. This mod also won't work for those who don't own space age, and this portal will mark it as a space age mod, once the feature flag is present in info.json.

Hey thank you for the bug and the tip how to fix it! Should be fixed.

Not quite right.

Instead of this:
{
"name": "everything-spoils",
"version": "1.0.1",
"title": "Everything spoils!",
"author": "Christopher Kenyon",
"factorio_version": "2.0",
"description": "All crafted items slowly spoil back into their primary ingredient.",
"dependencies": [
"base >= 2.0",
"? space-age"
],
"features": {
"spoiling_required": true
}
}

It needs to be more like this:
{
"name": "everything-spoils",
"version": "1.0.1",
"title": "Everything spoils!",
"author": "Christopher Kenyon",
"factorio_version": "2.0",
"description": "All crafted items slowly spoil back into their primary ingredient.",
"dependencies": [
"base >= 2.0",
"? space-age"
],
"spoiling_required": true
}

Thank you for being so nice! Hopefully sorted!