Default Unlock Checker

Default Unlock Checker helps if you can't find items like Torch, Campfire, etc. in your "Crafting" menu.

When use, it will say "are any default unlocks (like Torch) missing?" and "How many are missing". Unless it says "0 unlocks missing", you have a problem.

Why are items missing?
This is caused by some third-party mod being written incorrectly (first of all, look at the page Incompatible for a list of mods that are known to affect "Crafting" menu).

You should identify that mod and ask their developer to fix it.

I'm a developer of mod that has this issue, how do I fix this?
When written correctly, another mod adds default unlocks like this:

When incorrectly, like this:

Second approach makes the order of "defaultBlueprints" unpredictable, thus causing unlocks of Torches, Campfire, etc. to end up in places where other items (those items that now require research and must have their unlocks removed) had their unlocks.